What caused the united states to enter world war ii on the side of the allies? a. germany's attack on britain b. japan's attack on pearl harbor, hawaii c. germany's invasion of poland d. japan's occupation of parts of china

B.

Japan's attack on Pearl Harbor.

The U.S. could not sit back after an attack

That could seem weak and make a possibility of another attack.

So they declared war and nuked Japan after lots of fighting.

That is just some facts, not it all.

what are the options?