What was the Reagan Doctrine?

Question

The Reagan administration’s policy to liberate South America from European imperialism.
The Reagan administration’s system for codifying other nations by the level of danger they posed to the United States.
The Reagan administration’s strategy to overwhelm the Soviet Union’s global influence.
The Reagan administration’s plan to rid Asia from Communism through indirect intervention.
Is it the last one?

Answer 1

There's a better answer.

https://2001-2009.state.gov/r/pa/ho/time/rd/17741.htm