The correct answer is B) to quickly end the war without an invasion.
<em>Harry S. Truman decided to use the atomic bomb to quickly end the war without an invasion.
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The Manhattan Project was the investigation that developed was is known as the first atomic bomb. President Harry S. Truman made the difficult decision to use the bomb to attack Japan and to quickly end the war without an invasion. The first atomic bomb was launched over Hiroshima, Japan on August 6, 1945. The second bomb exploded over Nagasaki on August 9, 1945. This accomplished the mission, the Japanese surrendered.
