Answer:
The domino effect.
Explanation:
The Domino effect is the theory that when one country falls to communism then more will soon follow, one by one. This is what got us into the Cold War and all conflicts surrounding it, including the Korean and Vietnam War.
Tiananmen Square
The fall of the Berlin Wall
Anti-Apartheid movement
Brazil getting coffee was a result of the Colombian exchange so your answer would be B
<span>an executive order signed by president Bush in 2001.
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