Why did reagan support rebellions in afghanistan, nicaragua, el salvador, and grenada?
a. to undermine right-wing extremists
b. to weaken the soviet union
c. to protect human rights
d. to promote democratic governments

The correct answer is B. to weaken the Soviet Union

All of the countries mentioned were supported by the Soviet Union or the Union wanted to control them for promoting their own agendas. By supporting the rebellions, the US weakened the plans of the Soviets.

And this too use this if needed