After Dropping Two Atomic Bombs on Japan,the United States

After dropping two atomic bombs on Japan,the United States:

A) accepted Japan's surrender,albeit with the condition that the emperor could keep his throne.
B) accepted Japan's unconditional surrender.
C) launched the amphibious invasion of Japan,the final operation of World War II.
D) returned its attention to fighting the war in Europe.
E) dropped a third on Tokyo to force the Japanese surrender.