What effect did President Ronald Reagan's policies have on the collapse of the Soviet Union?
Group of answer choices

He promised to break ties with any US allies who did business with the Soviet Union, leading to shortages of necessary goods in the country.

He secured control of important oil reserves in Soviet satellite republics, eliminating a major source of the government's revenue.

He pursued an arms race against the Soviets, which forced them to overspend on their military and weakened their economy.

He relaxed the nation's immigration policy to encourage Soviet citizens to come to the US, leading to labor shortages in the Soviet Union.