Carpal tunnel syndrome, a nerve disorder that affects the hands and wrists, ... ...

Which one of the following, if true, most helps to explain the study’s findings?
(A) Office workers who have the most control over their own work tend to do significantly less typing than do those who have the least control over their own work.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in June 2012 LSAT (PT66): Logical Reasoning B