.The belief if one country in a region fell to communism the rest would follow
A Country Appropriation
B Domino Theory
C Broken Glass Theory
D Satellite States Theory

The answer is B “Domino Theory”

Country Appropriation- Is the adoption of elements of one culture by another culture.

Broken Glass Theory- That visible signs of crime will induce other types of crime

Satellite States Theory- That a country is formally independent, but is under heavy influence from another country.

Domino Theory- That one event in a country will cause events in other neighboring countries.

Like a row of dominos, if one falls it makes the other one fall, ultimately causing all the dominos in the row to fall too.