Why was the attack on the Lusitania significant?

A German U-boat torpedoed the British steamship Lusitania, killing 1,195 people including some Americans. The disaster brought forth events that led to the U.S. going into World War I

Explanation:

congress failed to remove johnson. but it did succeed in getting control of efforts to re-build the south following america's civil war. radical republicans wanted to punish the south for starting the war. they also wanted to be sure new governments in the southern states would support the republican party.

i think it would be c.

hope i'm correct

explanation: