Extract the answer to the question from the following context.
Question: Who reported that the signing label valued the artist less for rapping and more for producing?
Context: According to Capitol Record's A&R, Joe Weinberger, he was approached by West and almost signed a deal with him, but another person in the company convinced Capitol's president not to. Desperate to keep West from defecting to another label, then-label head Damon Dash reluctantly signed West to Roc-A-Fella Records. Jay-Z later admitted that Roc-A-Fella was initially reluctant to support West as a rapper, claiming that many saw him as a producer first and foremost, and that his background contrasted with that of his labelmates.
Jay-Z
The context suggests that the label was not supportive of West's rapping career, claiming he was more of a producer. Jay-Z is mentioned in this context and admitted to being reluctant about supporting him as an artist. So it can be inferred from the passage that Jay-Z reported on this issue with regard to how the signing label valued his rap abilities. Therefore, Jay Z would be the best answer choice here..