when did the united states enter world war ii?\n○ before poland was invaded by germany\n○ after japan bombed…

when did the united states enter world war ii?\n○ before poland was invaded by germany\n○ after japan bombed pearl harbor\n○ when great britain and france declared war\n○ during the invasion of belgium and the netherlands
Answer
Brief Explanations:
The United States entered World War II after the Japanese surprise - attack on Pearl Harbor on December 7, 1941. Before that, the U.S. had been providing some aid but was not directly involved in the fighting. Germany invaded Poland in 1939, Great Britain and France declared war on Germany in 1939, and the invasion of Belgium and the Netherlands occurred in 1940.
Answer:
B. after Japan bombed Pearl Harbor