Concerning the Background to the Pearl Harbor Attack, Which of the Following

Concerning the background to the Pearl Harbor attack, which of the following statements is true?

A) Right up until the Japanese attack on Pearl Harbor, President Roosevelt was one of the country's most outspoken isolationists.
B) The text ultimately explains the coming of war with Japan by showing how each side came to understand the other's intentions.
C) Clear evidence now exists that President Franklin Roosevelt knew about and even encouraged the Japanese to attack Pearl Harbor in 1941.
D) Before Pearl Harbor, the U.S. provided substantial military aid to the British and Russians.