In the examples of North America and South Vietnam, the united states chose a course of action that could best be described as____________.

Intervention***
Imperialism
Diplomacy
Isolation

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what is the answer

The correct answer is "Intervention." To determine the answer, let's look at the context of the question. The examples of North America and South Vietnam suggest that the United States took a specific course of action. To assess this, we need to examine what each option means:

- Imperialism refers to a policy of extending a country's power and influence through direct or indirect control over other territories.
- Diplomacy refers to the practice of conducting negotiations between nations to settle disputes and establish agreements.
- Isolation refers to the policy of remaining apart from the affairs or interests of other groups, especially political affairs of other countries.

Considering the historical context, the United States' involvement in both North America (through colonization and territorial expansion) and South Vietnam (through military intervention during the Vietnam War) indicates that the United States actively intervened in these regions. Therefore, "Intervention" is the best description of the course of action chosen by the United States in these examples.