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 other options may contain elements of truth regarding the broader context of the war, Truman's decision was heavily influenced by estimates of the potential casualties and costs associated with a full-scale invasion of Japan, which were projected to be significantly high. This concern, along with the desire to end the war quickly, ultimately led him to consider alternative options, including the use of atomic bombs.