The author supports the central idea of the passage by explaining how Sarah Katz's experiences as a deaf student influenced her desire to create a space for writers with disabilities. Katz's background and her journey to seek out community illustrate the importance of representation and accessibility in the literary world. The emphasis on her challenges and the intention behind the magazine underscores its mission to be an inclusive platform for those with disabilities. Therefore, the best response would be:
by explaining how magazines can be accessible to those with disabilities