Answer: Haya~!
The correct answer is C) Truman decided to drop the atomic bomb on mainland Japan.
The fighting in Iwo Jima and Okinawa affected the Allies' Pacific strategy in that Truman decided to drop the atomic bomb on mainland Japan.
On August 6, 1945, United States President Harry Truman authorized the dropping of a nuclear bomb over Hiroshima, Japan. The explosion killed 180000 people. On August 9, Truman ordered dropping another nuclear bomb, now in Nagasaki, Japan, jilling other 100000 people. The radiation produced by the bombs damage other thousands of people closed to these areas.
Explanation: I took the test
Hope this Helps!