The majority of american intervention in foreign affairs occurred during which event?
imperialism
world war one
world war 2
cold war

The correct answer is: "the Cold war".

During the Cold War era, the US had adopted the containment strategy, a foreign affairs approach which focused on stopping the spread of communism worldwide, that was already suceeding on the Eastern European regions where the URSS had managed to impose its influence sucessfully.

Directly attacking the URSS would have meant a nuclear war and the destruction of both the US and the communist bloc leaded by the URSS. This is why URSS and US fought indirectly by intervining in proxy wars (for example, Korea or Vietnam), where they supported opposite sides.

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation:

b. the passage of the equal rights amendment  

explanation:

this mean that anything that someone else could do they could do