Question

when did the united states enter world war ii?
○ before poland was invaded by germany
○ after japan bombed pearl harbor
○ when great britain and france declared war
○ during the invasion of belgium and the netherlands

Explanation:

To determine when the US entered WWII, we analyze each option:

• Poland was invaded by Germany in 1939 (start of WWII in Europe), and the US entered later, so the first option is wrong.
• Japan bombed Pearl Harbor on December 7, 1941. The US declared war on Japan the next day, entering WWII. This matches.
• Great Britain and France declared war in 1939 (after Poland's invasion), but the US didn't enter then.
• The invasion of Belgium and the Netherlands was in 1940, and the US wasn't in the war then.

Answer:

B. after Japan bombed Pearl Harbor