PT 60 S3 Q24

   Music critic: How well an underground rock group'srecordings ... ...

Which one of the following principles, if valid, most helps to justify the music critic's argument?
(A) If an underground rock group is successful as an underground group, its recordings will sell neither especially well nor especially poorly.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Complete Section: LR-B, June '10 LSAT (PT 60 Sec. 3)