How did the events of december 7, 1941 change the course of world war ii?

these events gave the us a key victory in the conflict.
these events allowed the us to remain neutral in the conflict.
these events forced the us to enter the conflict.
these events led the us to withdraw from the conflict.

The date December 7, 1941 is the bombing of the Pearl Harbour. This surprise attack by the Japanese on America signifies the start of the world war II in the Pacific. The event eventually lead the United States to join the world war and declare war on the Japanese Empire. Therefore the answer would be letter C.

Slander.