Question

which event forced the united states to end its policy of isolationism during wwii?
the nazi aerial blitz of london
the japanese attack on pearl harbor
the german u - boat attack on a us passenger vessel
the nazi invasion and conquest of france

Explanation:

Before the Japanese attack on Pearl Harbor on December 7, 1941, the US had a policy of isolationism. This surprise military strike by Japan directly threatened US territory and interests, leading the US to enter World War II and end its isolationist stance.

Answer:

B. the Japanese attack on Pearl Harbor