What was the name of the theory that said that if one country in a region fell to communism, others would surely follow?
domino theory
arms race
brinkmanship
containment theory
o

The right answer is:  domino theory.

Explanation:

The domino theory was seen as a likely outcome in the geopolitical chess of the Cold War in the developing world. According to the views and mentality of the era, if one country falls to Communist hands, neighbors will follow. It was a rationale for action in both Korea and Vietnam. It was also applied to Latin America.

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.

during world war ii