It is important to know whether a text is fiction or nonfiction in order to (B)

decide if comprehension is important.
determine which strategy to use. (CORRECT)
decide if a strategy is needed.
determine the text’s relevance.

Despite the overwhelming body of academic work on the civil war produced in the united states (and beyond) most of the american public (as well as the international audience) has been exposed to it through cultural texts such as novels, poems, songs, motion pictures, tv series, and documentaries.