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
D. The European population doubled as they benefited the most from the colonization of the Americas. Thousands of Native Americans died from working and of disease. Millions of Africans were sent to the Americas as slaves through slave trade
I think it is "isolating themselves from other Asian Nations"?
I think it would be the third one