The statement that best analyzes why President Truman decided to abandon the plan to launch an amphibious invasion of Japan in 1945 is:
Truman realized that the invasion would cost too much money and American lives.
While the use of atomic bombs and other factors played a role in his decision-making, the significant concerns over the potential casualties and costs of a large-scale invasion were critical in his choice to pursue alternative means to bring about Japan's surrender.