Who authorized the atomic bomb to be dropped on Japan?

President Harry S. Truman

Explanation:

After Japanese leaders flatly rejected the Potsdam Declaration, President Truman authorized use of the atomic bomb anytime after August 3, 1945.

President Truman authorized the atomic bomb, nicknamed little boy to be dropped on Japan, on the city of Hiroshima.

the answer should be a. the sui empire, the tang empire extended from korea in the west to manchuria in the east.