The correct answers are B and D.
The Japanese attack on Pearl Harbor, located in the US state of Hawaii, took place in 1941, and it subsequently led to the involvement of the United States, that had remained neutral until this event, in WWII.
It was a surprise air attack conducted by the Japanese Imperial Air Service, aiming to destroy the US Pacific Fleet that could interfere with their plans of territorial dominance in Southeast Asia, where Japan intended to control overseas territories governed by the UK, the Netherlands of the US.
<u>The Japanese managed to cause severe material damages to the US Navy and also killed many soldiers and civilians</u>: All eight battleships were damaged and four of them sunk. They also managed to damage three cruisers, three destroyers, one anti-aircraft training ship and a minelayer. 188 U.S. aircrafts were destroyed, more than 2,400 US citizens were killed and around 1,200 others were injured.