Which sentence is punctuated correctly?

Which sentence is punctuated correctly? A. President Kennedy told the nation "Ask not what your country can do for you Ask what you can do for your country" B. President Kennedy told the nation, "Ask not what your country can do for you, Ask what you can do for your country? " C. President Kennedy told the nation, "Ask not what your country can do for you. Ask what you can do for your country. " D. President Kennedy, told the nation, "Ask not what your country can do for you? Ask what you can do for your country.