Which paragraphs are the conclusion of the essay, “Working at McDonald’s”?

Which paragraphs are the conclusion of the essay, “Working at McDonald’s”?
A.Paragraph 22.
B.Paragraphs 21-22.
C.Paragraphs 20-22.
D.Paragraphs 19-22.
正确答案：Paragraphs 21-22.
Functions of the introduction section