In "The Setting Sun and the Rolling World," what do both Musoni and Nhamo love?

The correct answer is C. Reader's guide. 

Usually, there is a reference list for all the available magazine articles that is arranged alphabetically by subject. This is called a reader's guide. A newspaper index is a reference for newspapers base on the issue date while a card catalog is a reference in finding authors of books. So the correct answer is C. I hope this answer helped you.