Why did the United States support many Dictatorships in Latin American Countries, despite them being unjust and cruel leaders?

Question 4 options:

They had family members in the US government.

They paid the US tribute in return for our military support and intervention.

They were capitalist leaders who opposed communism.

Question 5
Why did many of those ruthless dictators in Latin America fall after 1991?

Question 5 options:

The US no longer needed to support them with the threat of the Soviet Union gone after they dissolved.

The US saw that they were wrong for supporting them, and decided to help rebel groups to topple these dictators.

The Dictators believed it was in the best interest of the people to relinquish their power, as long as they were able to have a position in the government.