Question

after the attack on pearl harbor, approximately how many americans signed up for the war?
1 million
10 million
5 million

Explanation:

After the attack on Pearl Harbor, there was a surge in enlistment. Historical records show that approximately 10 million Americans signed up for the war (including both enlistment and the draft - related participation in the context of World War II after Pearl Harbor).

Answer:

10 million (the option with "10 million" text)