Scientists have created genetically modified (GM) tomatoes to produc

Deepakjhamb
This question is not as carefully written as an official GMAT CR question would be. For instance, C makes reference to "those who were eating tomatoes," when no actual study was cited in the original argument. If this were an official q, it would need to say that a study showed that those who ate tomatoes had a lower incidence of cancer. Then the assumption would be that there is no other reason for the result than the tomatoes that people were eating, and C would be clear.

However, in spite of these flaws, I was able to throw B out at a glance. Knowing that the cause of cancer is genetic doesn't tell us whether we can do something to prevent it. Something we eat could affect gene expression, or (using less fancy science), could counteract the effects of a genetic problem. That puts B completely out of scope. We are only worried about prevention, not determining the root cause. (We knew something had to cause cancer, and for our purposes, it doesn't matter what it is, unless it turns out to be tomatoes!)