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.
This reflects Truman's understanding of the potential high casualties associated with a land invasion of Japan, as estimates suggested that such an operation would result in significant loss of life for both American soldiers and Japanese civilians. This concern, coupled with the desire to bring about a swift end to the war, influenced his decision-making regarding the use of atomic bombs instead.