Answer :
The American use of atomic bombs against Japan in 1945 led to an arms race between the US and the Soviet Union. President Truman had anticipated the use of nuclear weapons striking fear into a now-powerful Stalin who was, at that point, rolling back the Nazis into Germany. However, Stalin - through use of an intelligence network - already knew of the US plan (Manhattan Project). It did strike fear into Stalin's heart, but that fear motivated him to push the Soviets to catch up with the United States in an arms race thereby starting the Cold War.
Answer:
I would go with B. They need a global regulator body to monitor the use of nuclear weapons
Explanation:
I tried A. Ban the use of bombs, but that was incorrect, and the answer below is incoherent