The correct answer is B) Allied nations met to agree on the goals and methods of the occupation.
Based on this excerpt, the postwar occupation of Japan was planned in that "Allied nations met to agree on the goals and methods of the occupation."
The text confirms this answer when it states that "In a series of wartime conferences, the leaders of the Allied powers of Great Britain, the Soviet Union, the Republic of China, and the United States discussed how to disarm Japan, deal with its colonies (especially Korea and Taiwan), stabilize the Japanese economy, and prevent the remilitarization of the state in the future.”
General Douglass A McArthur led the reconstruction of Japan after the US order the launch of atomic bombs over Hiroshima and Nagasaki in August 1945.