Questions 21-23 ask about Passage A.
21. In passage A, the information in (the highlighted phrase) sentence serves primarily to:
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.