Question

on may 7, 1915, german u-boats attacked the lusitania. the lusitania was a british ship. why did this attack upset the united states? the lusitania was carrying the british ambassador to the united states. the lusitania was a gift from the united states to great britain. the lusitania was the best warship the allied powers had. the lusitania had u.s. citizens on board.

Explanation:

The attack on the Lusitania upset the U.S. primarily because many American citizens were aboard the ship; their deaths sparked public outrage and strained U.S.-German relations.

Answer:

The Lusitania had U.S. citizens on board.