What was the Domino theory? a. If one country invade another country to control its government. b. One country would band with another to create a barrier to communism. If one country would pay for their freedom, the others will follow. d. If one country fell to communism, then all the other countries surrounding will fall as well. Please select the best answer from the choices provided Ο Α OB ОС

Correct answer is d. If one country fell to communism, then all the other countries surrounding will fall as well.

Explanation:

Option D is the correct answer because it refers to the theory that was developed among western countries, especially United States during the Cold War. Red Scarce that existed in United States back then led to the theory that Communism will spread as a plague.

Therefore other options are not correct.