What is the correct answer

I think its D

Explanation:

a sentence containing two or more coordinate independent clauses, usually joined by one or more conjunctions(and 'cause compound words use" For,And,Not,BUT,OR,YET, and so

the autor of the text is bringing the point that one achievment of the president john f. kennedy was a success and this caused the next president to use a similar idea. the purposefor the use of the quotation in the text is to support the idea that peace corps was a result of the president's call. in this case, the quotation is presented as part of the writing and does not stand on its own.

answer a.

the mending wall was written by robert frost