In a computer catalog, you could search for a nonfiction book by

a. author, title, or subject.
b. author or title only.

a. author, title, or subject.

In a computer catalog, you could search for a nonfiction book by:

a. author, title, or subject. This means you can search for a nonfiction book by entering the author's name, the book's title, or even a specific subject related to the book.

b. author or title only. This option limits your search to either the author's name or the book's title. You won't be able to search by subject in this case.