Refrigerator CR

[mover_prime]

The reason much refrigerated food spoils is that it ends up out of sight at the back of the shelf. So why not have round shelves that rotate? Because such rotating shelves would have just the same sort of drawback, since things would fall off the shelves' edges into the rear corners.
Which of the following is presupposed in the argument against introducing rotating shelves?
(A) Refrigerators would not be made so that their interior space is cylindrical.
(B) Refrigerators would not be made to have a window in front for easy viewing of their contents without opening the door.
(C) The problem of spoilage of refrigerated food is not amenable to any solution based on design changes.
(D) Refrigerators are so well designed that there are bound to be drawbacks to any design change.
(E) Rotating shelves would be designed to rotate only while the refrigerator door was open.
This is a problem from ETS test 31
Dear Ron I am having hard time with assumption questions.Please advice me to solve them(if not logically then atleast mechanically)

[tim]

This is way too big of an issue to address in our forums. We have an entire chapter in our Critical Reasoning book devoted to assumptions strategy, so you’ll want to refer to that chapter. We can help answer questions about specific problems in the forums. We are happy to do so if you can describe what you’ve done with this problem and where you are stuck, and if you can point us to a non-copyrighted GMAT source for this problem. The problem you posted appears to be one that comes from a copyrighted (and therefore illegal) source, so unless the next post on this topic identifies the source as a GMAT Prep question, we will have to delete the entire question..

[Everything OR Nothing]

Dear GMAT instructors, I Thought the answer should be C.
Why A is beyond my understanding.

C says : The problem of spoilage of refrigerated food is not amenable to any solution based on design changes.
This means any design change can not correct the problem of Falling off of Foods from the rotating shelf edges.

But if A is correct, How can we be so sure that Cylindrical shape will correct the problem of food falling off from rotating edges.what is cylindrical design all about? is it explained in the premise somewhere?

[RonPurewal]

Imagine a circular shelf, inside a refrigerator that's shaped like a cylinder. (You can also use common sense to infer that the shelf will be the correct size to fit inside the refrigerator.) Now, picture whether things will be able to fall off the shelf.

If this problem is from an ETS paper test, we shouldn't be discussing it in the first place (that's a banned source), so this thread is now locked.