GMAT Sentence Correction (SC) | While some propose to combat widespread illegal copying of

C is incorrect because of the error "for decreasing", it should be "to decrease" => this change the meaning
the parallel here is a trap. --> X proposes, Y suggests, and Z are calling --> Z is distinct from X and Y. Also, the meaning between C and E does not change if verb of Z changes from "are calling" to "calls for"

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