Which of the Following Statements About the Battle of Okinawa

Which of the following statements about the Battle of Okinawa is true?

A) It took place early in the war and involved the capture of American civilians, turning the United States against Japan.
B) It preceded the attack on Pearl Harbor, but Roosevelt did not learn of the fighting until later.
C) It was the first American victory of the war in the Pacific and resulted in such few casualties that Truman felt the end of the war was imminent.
D) It was the largest amphibious operation of the war in the Pacific and the staging area for a planned invasion of Japan.
E) It was a quick and decisive Japanese victory that convinced the United States to withdraw all American troops from the Pacific.