Answer: J. The Japanese bombing of a U.S military base
Explanation: The Japanese bombing of Pearl Harbor on December 7, 1941, led to the United States declaring war on Japan, and on December 11, 1941, Germany and Italy declared war on the United States.
The correct answer is J The Japanese bombing of a U.S military base. The attack on Pearl Harbor on December 7, 1941 led to the U.S entering World War II.