I would say the answer is A. Hope this helped!
-Twix
The attack on Pearl Harbor made changed American's attitude's towards entering WWII so after the attack, America participated in the war.
Answer:
It had its origins in the ballistic missile-based nuclear arms race between the two nations following World War II. The technological advantage demonstrated by spaceflight achievement was seen as necessary for national security and became part of the symbolism and ideology of the time