Which of the following was not a feature of American involvement in World War II?

Which of the following was not a feature of American involvement in World War II?

a.Truman's decision to drop the atomic bomb on Japan was based in part on a fear that hundreds of thousands of Americans might otherwise die in a land war.b.It took the Japanese attack on Pearl Harbor to shock a reluctant nation into entering the war.c.FDR agreed to a wartime alliance with the Soviet Union only after Stalin promised to rid his country of communism after the war.d.Only with the Allied invasion of Normandy did American troops assume a major presence in European com