Marvin has been asked to organize some boxes of books that have been dropped off at the place he volunteers on weekends. His director doesn't care how he organizes the books and told Marvin to pick a
strategy that makes it easy to for people to find books that match their interests or preferred writing style. As he sorts the books, he notices the books fall into different categories, like fiction, poetry, and
creative nonfiction. Based on this information, what is the BEST way for Marvin to organize the books?

A. by language

B. by genre

C. by author

D. by geographical region