President eisenhower believed in the domino theory, which states that a). if an aggressor nation invades one country successfully, it will invade another. b). if one country falls to communism, its neighbors are also likely to do so. c). if the united states can defeat one communist country, it can defeat them all. d). if one section of a country is taken over, the rest of the country will also fall.

B) If one country falls to communism, its neighbors are also likely to do so.

Explanation:

This fear of communism spreading was due to America's rivalry with the Soviet Union after World War II. This era of competition for global influence and power is known as the Cold War. During this time, the US worried about the spread of communism and the domino theory.

To prevent this domino theory from taking place, the US government adopted a policy of containment. Containment was focused on stopping the spread of communism to new countries. This is one of the reasons why the US would get involved in the Korean and Vietnam Wars.

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.

the answer is use of support