Question

President Eisenhower's domino theory was based on the idea of..
containment.
democratization.
economic expansion.
national self-determination.

Answer 1

I'd say containment. That was the policy developed to try and 'contain' communism by limiting its influence. The domino theory feared that if one nation in a region, such as Southeast Asia, fell to communism, others around it would follow in a domino effect.