The correct answer is B) Japan was prolonging a terrible and bloody war that had an inevitable outcome.
The other options of the question were A) The US wanted to make Japan surrender before the Soviets arrived. C) An atomic bomb caused more damage more efficiently than B-29 bombers. D) Nations that failed to surrender to the Allies were asking for a nuclear attack.
Based on the excerpt, the sentence that best summarizes the Allies' reason for using the atomic bomb on Japan was that Japan was prolonging a terrible and bloody war that had an inevitable outcome.
The United States President Harry Truman made the difficult decision to launch the bombs because this was the only way to end a war that could have been unnecessary prolonged. Truman gave the order to the US Air Force and the bombs were launched over Hiroshima and Nagasaki on August 6, 1945, and August 9, 1945. Japan had to immediately surrender