Questions 21-23 ask about Passage A.

21. In passage A, the information in (the highlighted phrase) sentence serves primarily to:

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

Introduces the history of Oklahoma City, which can also be judged by the previous sentence L 8, "Smith dug back into the history".

Item A: It has nothing to do with the content of this drama, but simply introduces the history of the city.

BC Item: Not mentioned.