Which of the following descriptions describes the domino effect in relation to u. s. policy in indochina during the cold war?

The fear among U.S. policy makers that if communism succeeded in Vietnam, it would sweep through the rest of the region

The war began as a fight between mayans and the landowners of the country. the main causes of the guatemalan civil war was started by the greed of the united fruit company, the fear of communism, and the racism toward the  mayan  people.