The correct answers are:
1) The United States had to give up its missiles in Turkey- The Soviet Union wanted America to remove the missiles because they felt threatened by their presence, considering that Turkey is very close to the Soviet Union and their satellite states.
2) Russia agreed to remove all their missiles from Cuba- This would ensure the United States that the Soviet Union had no plan to launch a nuclear attack against the US.
3) America had to promise not to ever invade Cuba.- The Soviet Union and Cuba wanted this because America tried to invade this country before. This was known as the Bay of Pigs Invasion.