Answer:
I am pretty sure it is the C.
Explanation:
The reasons is that A and D are broken apart too much and B is just a run on sentence.
Answer:
President Kennedy told the nation, "Ask not what your country can do for you. Ask what you can do for your country."
Explanation:
The correct answer should have quotation marks around what the president said. There should be a comma to introduce the quote. It should appear before the opening quotation mark. A period that ends the sentence should always go inside of the quotation marks.