PT 59 S2 Q26

   Commentator: For a free market to function properly,each ... ...

The conclusion of the commentator's argument follows logically if which one of the following is assumed?
(A) People do not usually shop for auto repairs but instead take their autos to their regular repair shop out of habit.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Complete Section: LR-A, Dec. '09 LSAT (PT 59 Sec. 2)