What motivates josh bell in the crossover

The excerpt is from a longer essay on huckleberry finn by mark twain. what kind of support is used to develop the writer's main idea regarding how twain brought his characters to life?

Whenever we take information from another source – whether we use the information word for word or we put the information into our own words – we must use a(n) right after where the research occurs in the paper.

Where sarah live? a. are b. is c. do d. does