Which sentence needs an apostrophe added to be correct?

Pls, i really need on this question?

Which sentence from the article best supports the statement above

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?