Answer:
B He won a close race
Explanation:
Kennedy won a 303 to 219 Electoral College victory, and he won the national popular vote by 112,827, a margin of 0.17 percent.
link to full info: https://en.wikipedia.org/wiki/1960_United_States_presidential_election#:~:text=Kennedy%20won%20a%20303%20to,a%20margin%20of%200.17%20percent.