Public health officials have long recommended that people consume low-fat diets to decrease the risk of heart disease. Extensive nutritional studies have shown that fats are more calorie-dense than carbohydrates or proteins. If, as many nutritionists believe,
calories are the primary contributor to weight gain and thus to heart disease, then by encouraging a low-fat diet,
public health campaigns can effectively reduce the incidence of heart disease. However, recent research suggests that not all fats are harmful and that some, like those found in nuts and fish, are actually beneficial for heart health.
In the argument above, the two portions in bold play which of the following roles?
(A) The first is a hypothesis that has been traditionally accepted in nutritional science; the second is a conclusion derived from this hypothesis that the argument ultimately disputes.
-- The argument states that public officials have recommended low-fat consumption and that nutritionists believe calories are the primary contributor to weight gain and thus to heart disease, nowhere does it imply that the first bold part is a hypothesis that is traditionally accepted in nutritional science. Eliminate.
(B) The first is the conclusion that the argument seeks to establish; the second is a premise that is used to support this conclusion.
-- First is not the conclusion of the argument. Eliminate.
(C) The first is an assumption underlying the public health recommendations; the second is an inference drawn from this assumption that the argument challenges.
-- Correct. The first part is an assumption by public health officials and the second part is inferred from it.
(D) The first is a belief held by many nutritionists that the argument aims to refute; the second is a strategy based on this belief that the argument suggests is flawed.
-- The first part is correct however in the second part the argument doesn't state that the strategy is flawed but rather points out cases opposite to the one stated where fats might be helpful. This does not imply that the argument is outright rejecting the strategy. Eliminate.
(E) The first is a claim that the argument questions; the second is the position that the argument advocates.
-- The argument doesn't advocate the second part, 180 degrees. Eliminate.
Ans=C.