Could you kindly help out with below questions -
[text edited]
Residents of Iqaluit, the largest town in the Canadian territory of Nunavut, pay as much as four times the prices paid for grocery items by residents of large Canadian cities, most of which enter the town only by sealift.
A the prices paid for grocery items by residents of large Canadian cities
B the price of what large Canadian city residents pay for grocery items
C what residents of large Canadian cities pay for grocery items
D of what large Canadian city residents pay for grocery items
E the cost of the grocery items purchased by large Canadian cities’ residents
I understand , choice D is incorrect because the phrase "large Canadian city residents" is not very clear. It appears as in the residents are large. So C is a clear winner here, however i couldn't understand why the usage of "of" in option d is incorrect.
For Example- please let me know which one of below is correct -
1 - I paid four times as much as 25 USD?
2 - I paid four times as much as of 25 USD?
If 2 is absolutely wrong and not acceptable then I am clear. My concepts were wrong. If 2 is acceptable then kindly explain why usage of "of" is incorrect in D.