This is a Strengthen question regarding "healthful effects of moderate wine consumption." So, anything that contributes to the author's given facts to support his argument: wine is different from other alcoholic beverages in preventing premature heart disease.
Let's go to the answer choices.
A) Line 53-60 suggests that it’s likely to be some effect from grape that acts positively in preventing premature heart disease. So, A) would strengthen the author’s argument. (Correct)
B) Since the author advocates that there is a difference in wine consumption and other alcohol consumption, this would weaken the argument.
C) “greater platelet adhesiveness” is harmful to premature heart disease. So, this would weaken it.
D) Again, since Line 25-29 states that there has been DECREASE in death from premature heart disease due to wine consumption, this would weaken the argument.
E) Bringing in a new subject of “gene” is irrelevant to the argument.