Answer:
Option: The development of the hydrogen bomb
Step-by-step explanation:
The Arms Race after World War II created a scenario for the United States and the Soviet Union to develop a nuclear weapon, which began to be known as the Cold War. To show powers both began to produce atomic weapons and tested first intercontinental ballistic missiles. All this started when the United States began to see the Soviet Union with a suspicious eye as they tried to expand their territory in Eastern Europe.