Studies have found that human tears contain many of the same hormones that ... ...

Studies have found that human tears contain many of the same hormones that the human body produces in times of emotional stress. Hence, shedding tears removes significant quantities of these hormones from the body. Therefore, crying must have the effect of reducing emotional stress. The reasoning in the argument is most vulnerable to criticism on the grounds that the argument
(A) overlooks the possibility that if crying has a tendency to reduce emotional stress, this tendency might arise because of something other than the shedding of tears
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Dec 2012 LSAT (PT68): Logical Reasoning A