Hi Ashish,
You seem more interested in solving the problem for the CFO than answering the question. Please bear in mind that with CR, you are given an argument which is 3-4 lines long. You may not like whats in those arguments, but you have to adhere to the information provided. You are allowed to make logical assumptions when getting to the answer but not drastic ones that sound better. Your reasoning is making far too many assumptions and you are making them based on your opinions or experiences.
I will try and point out some issues with your explanation of Choice A:
CFO has already come up with a logic on when to divest.
He has made a recommendation but where does it say "when"? Yes, there may be a "when" in that recommendation but is that relevant to answer this question?
The question is about evaluating whether CFO's logic of divesting is warranted or not.
Ok...I would use the word decision instead of logic
Note: He has not made a decision yet.
He has put forward a recommendation and the question clearly asks whether his
decision is justified. I can see how you got to this: He has put forward a recommendation but in his mind, he may not have decided. Possible and arguable but once again, is this really relevant?
The question asks about no matter what happens, will his alternative strategy work.
This is where you start going off track. There is no mention of an alternative strategy in the argument.
If yes, then how do we MAKE SURE before he makes a decision.
And now you that you have already gone off track, this is going even further.
This should be CORRECT answer because irrespective of whatever happens with the existing product, his decision is warranted if there exists other product which is profitable
Even though you are wrong about this being the correct answer, this is the only line that makes some sense based on what Choice A says.
(however in general business sense, a CFO would make decison of long-term cash flow and not a point of time profit margin as decsribed in the problem) CORRECT.
Once again, no need to think this far. But I think you may have just put this out as a thought... fair enough
Stick to the argument and what the question asks. Do not make far fetched assumptions. You will suffer on the GMAT if you do. This post has been answered by almost 4 instructors. Its good to question reasons behind wrong answers and pick their brains on the whys. But refuting all of them together in the same post is just a waste of time. Not saying that there is anything wrong with asking questions, but questioning the right answer on the GMAT with such conviction is again a waste of time. You will see many posts where instructors have clearly said: The right answer on the GMAT is always right. It that were not true, GMAT would be facing law suits for the rest of its foreseeable existence.
My advice to you is to go through the CR guide, if you have not already done so and try and get the right mindset to answer these type of questions. You must attain the discipline to not bring in external knowledge to the point that it starts harming you.
Regards
Sunil