The section "Books Before the Printing Press" supports the main idea primarily:
B. by providing information that will emphasize the benefits of the printing press.
This section outlines the labor-intensive and time-consuming process of copying books by hand, highlighting the limited access to books and intellectual content prior to the invention of the printing press. By describing the difficulties faced in book production before Gutenberg's invention, it sets the stage for understanding the transformative benefits that the printing press brought to society, such as efficiency, accessibility, and the ability to produce multiple copies consistently.