In a recent study of people afflicted by the Babblers

Explanation:

Here in the argument, the conclusion made is: Nil or moderate (at best) quantities of dairy products consumption will reduce the chances of getting afflicted with Babblers syndrome. Other way to say it would be: Consumption of dairy products in much larger quantities increases the chances of getting afflicted with Babblers syndrome.

Evidence for this conclusion is the result of a study which presents the correlation between Babblers Syndrome and consumption of dairy products in much larger quantities.

No proper information is given on which one is the cause and which one is the effect. There can be several scenarios related to this situation.
1) Consumption of dairy products in large quantities causes Babblers syndrome
2) Babblers syndrome induces high consumption of dairy products
3) There is no actual correlation between Babblers Syndrome and high consumption of dairy products, and the study result is a mere coincidence. Cause for Babblers Syndrome is something else.

To arrive to the stated conclusion from the given evidence, we have to assume that first scenario is true and second and third scenarios are false.

A) Our concern is to find the effect of high consumption of dairy products on the specific problem "Babblers Syndrome" and not the health problem in general. Out of scope.

B) This statement is not related to the conclusion of the argument. Out of scope.

C) This statement says that scenario 2 above is false and thus it is supportive of the conclusion. Correct.

D) The argument says that nil/low consumption of dairy products will reduce the chance of having Babblers Syndrome -- this does not mean that nil/low consumption will ensure the complete elimination of the chance of having Babblers Syndrome. Also the argument never says that the only way to get Babblers Syndrome is through consumption of dairy products. Wrong.

E) The argument never says that the only way to get Babblers Syndrome is through consumption of dairy products. The key here is consumption of dairy products in much larger quantities. Wrong.

Correct answer is C.

PS: The question is not difficult to answer considering GMAC's preferences. Point to note here is that some answer choices are good traps.