Which option is the middle part of the paragraph?
A. The closing sentence.
B. the opinion sentence.
C. the supporting sentences.
D. the topic sentence.

Realism was a fairly influential and widespread literary movement in the united states in the latter half of the nineteenth century. which american writer is among the pioneers of american realism? a. ernest hemingway b. f. scott fitzgerald c. j. d. salinger d. mark twain