PT 11 S4 Q23

A study of adults who suffer from migraine headaches revealed that a significant ... ...

The reasoning in the argument is vulnerable to criticism on which one of the following grounds?
(A) It does not specify the proportion of those in the general population who suffer from the syndrome.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: "Flawed Reasoning" Questions, Set 3 - Mix (25Q)