In a medical study of all of the residents of Groverhill, 35 people reported ... ...

In a medical study of all of the residents of Groverhill, 35 people reported consulting their physician last year seeking relief from severe headaches. Those same physicians’ records, however, indicate that 105 consultations occurred last year with Groverhill patients seeking relief from severe headaches. Obviously, then, many residents who consulted physicians for this condition did not remember doing so. The reasoning in the argument is most vulnerable to criticism on the grounds that the argument
(A) generalizes inappropriately from an unrepresentative sample of residents of Groverhill
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Oct 2012 LSAT (PT67): Logical Reasoning B