Help me solve this problem please

During the cold war, the united states was involved in certain regional conflicts due to fears later called the domino theory, which stated which concept?

The military dictatorship inviolently reacted to the opposition of the maya, who demanded greater rights for their native population. the genocide inresulted from a struggle between arab nomadic tribes and non-arab agricultural groups. the tutsi were the victims of genocide inat the hands of the hutu rulers.

The communists triumphed over forces because of a well-disciplined fighting force, a single - minded sense of zeal , and strong convictions.