Editorialist: Many professional musicians claim that unauthorized music-sharing ... ...

Editorialist: Many professional musicians claim that unauthorized music-sharing services, which allow listeners to obtain music for free, rob musicians of royalties. While it is true that musicians are deprived of royalties they deserve, music-sharing services are not to blame since record companies, publishers, managers, and other intermediaries take an inequitably large cut of the revenues from music sales. The reasoning in the editorialist’s argument is most vulnerable to criticism on the grounds that the argument
(A) concludes that one party is not blameworthy merely because another party is blameworthy
(B) ...
(C) ...
(D) ...
(E) ...

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