Public Health SC

[Viswanathan.harsha]

Concerns about public health led to to the construction between 1876 and 1904 of the three separate sewer systems to serve metropolitan Boston.

A. Same
B. Concerns about public health have led to to the construction of three separate sewer systems between 1876 and 1904 to serve
C. Concerns about public health have led between 1876 and 1904 to the construction of three separate sewer systems for serving
D. There were concerns about public health leading to the construction between 1876 and 1904 of three separate sewer systems serving
E. There were concerns leading between 1876 and 1904 to the constructions of three separate sewer systems for serving


OA A

I chose B but can someone explain why the dates must come before the object? Is it because if it is placed afterward, as in B, it improperly modifies the sewer systems opposed to the construction, which is correct? Also, is it wrong to say "have led" instead of just "led"? If so, can someone explain why?

[birlaka]

"Have led" would mean concerns continued till today, whereas the objective of the sentence is that there were concerns during the 1800's.

Concerns are not there anymore because these concerns led to the construction of sewers.

So a simple "led" with do. We don't need "have led" here. So that's how i eliminated B

[Viswanathan.harsha]

Thanks. Is that all that is wrong with B?

[gokul_nair1984]

@Harsha..

Another problem with 'B' is its ending...If this option were to be correct it would read like this..

Concerns about public health have led to to the construction of three separate sewer systems between
1876 and 1904 metropolitan Boston.

This surely does not make sense. There's got to be some verb between 1904 and metropolitan.Hence you can eliminate this option.

Hope I could help

[Viswanathan.harsha]

I apologize, it should have "to serve" at the end. I have corrected this in the original post.

[tim]

Thanks for correcting your post. The verb is the only thing you should focus on with A versus B. Placement of the modifiers is a judgment call and, while the placement in A is arguably better, that does not mean B is wrong for that reason. Please note also that you copied the problem incorrectly:

"Concerns about public health led to to the construction between 1876 and 1904 of the three separate sewer systems to serve"

You included an extra "the" in A that renders it incorrect in its present form, but i'm sure it wasn't that way in the original..

[FanPurewal]

hi there
can anyone tell me what are the grammar errors in choice B?

sorry i still can't find how to kick out B

thans in advance

[RonPurewal]

The post by "birlaka" explains the problem with "have led".

[cherryj222]

"Have led" would mean concerns continued till today, whereas the objective of the sentence is that there were concerns during the 1800's.

Concerns are not there anymore because these concerns led to the construction of sewers.

So a simple "led" with do. We don't need "have led" here. So that's how i eliminated B

Hi ron. I feel confused about the explaination about "have led" here. You have said that unless there is specific timeframe, present perfect tense just means something happened in the past, with an effect continuning into present. So, how can here "have led" mean the action continues till today?

[RonPurewal]

"Led to the construction" doesn't continue into the present. It continued up to the time of construction.

If you write "Concerns about ___ have led to the construction of Thing X", then "the construction of Thing X" must be something that's going on NOW.

[RonPurewal]

More generally, "has/have ___ed" is incompatible with anything that's given a fixed date in the past.

[thanghnvn]

I do not understand

in choice A, the OA, "to concern" have no agent. who do "concern"

normally, subject of main clause is agent of "to do"

I learn gmat to take MBA.

the patern in choice A is not explained in grammar book

[TristaC509]

I do not understand

in choice A, the OA, "to concern" have no agent. who do "concern"

normally, subject of main clause is agent of "to do"

I learn gmat to take MBA.

the patern in choice A is not explained in grammar book

"to serve" is used to modify sewer systems, because "serve..." is the intent of constructing sewer systems

[RonPurewal]

in this sentence, "concerns" is a noun.

[RonPurewal]

in fact, a formal english sentence can never start with a verb, unless the sentence is a command. (SC doesn't test commands.)