C - I hope it helps you <3
Answer is C
The issue with the US and USSR was the stockpile of nuclear weapons.
They agreed to remove them from Cuba
Population grew significantly mostly due to reproduction, but there was a significant number of immigrants, Scots-Irish and Germans, coast was more wealthy than west.
Reganomics refers to the economic policies US President Ronald Regan promoted during the 1980's. These policies were made to reduce the growth of government spending, reduce the federal income tax and capital gains tax, reduce government regulation and tighten the money supply in order to reduce inflation.<span />