Answer:
1 and 3
It eliminated the need for the United States to only work with other democracies throughout the world.
It proved that the United States was willing to work with nations with various political ideologies.
Explanation:
Firsthand accounts : eyewitness account, letter from a general to his troops, an interview of a war veteran
Secondhand accounts: television documentary, article
The 1970s are remember as an era when the women’s rights, gay rights and environmental movements competed with the Watergate scandal, the energy crisis and the ongoing Vietnam War for the world’s attention