PT 49 S4 Q2

Eating garlic reduces the levels of cholesterol and triglycerides in the ... ...

It would be most important to determine which one of the following in evaluating the argument?
(A) whether the garlic tablets are readily available to the public
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: "Weaker" Questions, Set 2 - "Evaluation" Subset