GMAT Critical Reasoning (CR) | Re: Among the more effective kinds of publicity that publishers

Among the more effective kinds of publicity that publishers can get for a new book is to have excerpts of it published in a high-circulation magazine soon before the book is published. The benefits of such excerption include not only a sure increase in sales but also a fee paid by the magazine to the book’s publisher.
Which of the following conclusions is best supported by the information above?

This is a conclusion question, so the answers should STICK to the info given in the statements.

(A)