<span>Democrat John F. Kennedy defeated incumbent Vice </span>President Richard
Nixon, the Republican Party nominee. The 1960 presidential
election was the closest election since 1916. This was the first election in
which all fifty states participated. It was also the first election in which an
incumbent president was ineligible to run for another term due to the
Twenty-second Amendment.
The best option from the list would be that "<span>b. The United States began to build up its military and to stockpile weapons," since this was part of the inevitable "Arms Race" that took place between the US and the USSR. </span>
