Option A. War of 1812 is the correct option. One of the last times the United States declared war was on Japan after the Pearl Harbor Attack in 1941. Options B, C, and D all occurred after this, and thus, they can be eliminated.
Dropping the bombs on Hiroshima and Nagasaki were not a military necessity because from other reports, the Japanese were about to surrender anyway. It was justifiable because we were scared and we acted because we were threatened.
Taking over the plans for Reconstruction.
Bottles that illuminate so they don’t have to waste energy