The correct answer is B.
The Nuclear Test Ban was signed on August 5, 1963.
Representatives from the United States, Soviet Union and Great Britain signed a treaty that prohibited the testing of nuclear weapons in outer space, underwater or in the atmosphere.
This treaty was an important step toward the control of nuclear weapons.
The Cuban Missile Crises provided a major push for reinvigorating the test ban talks because it showed that the world was very close to a real nuclear war.
