Question

during the 1930s the united states followed a foreign policy of isolationism. which is the best example of that policy?
forbidding americans to travel overseas
building up the nation’s armed forces
avoiding alliances with other nations
favoring great britain over the rising power of nazi germany

Explanation:

Isolationism means a country tries to stay out of international affairs. Avoiding alliances is a key aspect as it limits foreign - entanglements. Forbidding travel overseas was not a major isolationist policy measure in the 1930s. Building up armed forces can be for defense but not a pure isolationist act. Favoring one foreign power over another goes against isolationist principles.

Answer:

C. avoiding alliances with other nations