Critical Reasoning (CR) | Re: Muriel: I admire Favilla’s novels, but she does not deserve

Muriel: I admire Favilla’s novels, but she does not deserve to be considered a great writer. The point is that, no matter how distinctive her style may be, her subject matter is simply not varied enough.

John: I think you are wrong to use that criterion. A great writer does not need any diversity in subject matter; however, a great writer must at least have the ability to explore a particular theme deeply.

John’s statements commit him to which one of the following position?
(A) Even if