Harding and Coolidge both based their foreign policy on a return to

a. unionism
b. nativism
c. isolationism
d. progressivism

C?

Yep.

Yes, the correct answer is c. isolationism. Both Harding and Coolidge pursued foreign policies that focused on avoiding involvement in international conflicts and maintaining a policy of non-interference in the affairs of other nations. They believed in prioritizing domestic issues and focusing on domestic economic growth. This approach was known as isolationism.

Yes, you are correct. Harding and Coolidge both based their foreign policy on a return to isolationism (Option C).

In order to arrive at this answer, you can follow these steps:

1. Familiarize yourself with the historical context: Understand the time period in which Harding and Coolidge were in office. They were presidents during the 1920s, a period known as the "Roaring Twenties."

2. Research Harding and Coolidge's foreign policy: Look into their individual approaches to foreign affairs. Both presidents favored a more conservative and restrained approach to international relations, which can be categorized as isolationism.

3. Understand the term 'isolationism': Isolationism refers to a policy of non-involvement and non-interference in global affairs, emphasizing a focus on domestic affairs instead. It involves avoiding alliances, military interventions, and engaging in minimal diplomacy with other countries.

4. Assess the options: Review the provided options and determine which one aligns most closely with Harding and Coolidge's foreign policy. In this case, 'isolationism' (Option C) best reflects their approach.

Therefore, the correct answer is option C - isolationism.