What was the impact of the First World War on the United States during

What was the impact of the First World War on the United States during the 1920s?

a. The United States emerged as the most powerful country in the world and spent the 1920s solidifying its preeminence through political and economic policies.
b. The United States was greatly devastated financially and emotionally and spent the 1920s rebuilding financial and emotional confidence.
c. The United States emerged from the war as one of the dominant nations of the world and spent the 1920s economically and politically solidifying that dominance.
d. The United States was frightened by worldwide conflict and spent the 1920s doing everything it could to avoid foreign contacts.
e. The United States continued well into the 1920s to be divided by ethnicity, with German and Russian Americans on one side, and English and French Americans on the other.

ANSWER
C