Which statement is true of author Judith Ortiz Cofer?

Which three sentences in this excerpt from arthur conan doyle's "the contest" suggest that the author's tone is mocking?

What is one method for improving visual layout

Read the passage, then use the explanation to infer the meaning of the word predominant. the novel was so popular that it was eventually added to a list of books that every ninth grader had to read. it became the predominant work of literature. what is the most likely definition of the word predominant?