Which Statement Is Accurate Regarding the Events That Led to the Attack

Which statement is accurate regarding the events that led to the attack on Pearl Harbor?

A) The United States had intelligence reports that a Japanese attack was coming somewhere in the Pacific.
B) The United States believed that Japan was bluffing and no actual attack was being planned.
C) The United States knew that Hawaii would be attacked but did not know when the strike would occur.
D) Due to diplomatic progress, the United States did not believe that a Japanese offensive was possible.