The correct answer is B) They would become communist or form alliances with the Soviet Union.
After World War II and up until the 1980's, the US federal government adopted a policy of containment. This policy revolved around stopping the spread of communism all over the world. The reason the US developed this policy was because they were worried about the Soviet Union having more power/influence than the United States. When these nations became independent, America would try to ensure that they stayed free from communist influences.
The best way in which improved nuclear technology helps citizens and governments is that it improves the safety standards of the nuclear plants, which can be dangerous.
Afghanistan became an independent state when Amanullah established an alliance and signed a treaty of friendship with the Soviet Union. Hope this helps if you have any questions please feel free to message me;)
