Which of the Following Is True of the Incident in Which

Multiple Choice

Which of the following is true of the incident in which a German submarine fired on the American destroyer Greer?

A) It showed that Hitler wanted war with the United States.
B) It demonstrated that American ships could be attacked at any time without provocation.
C) It led President Roosevelt to give the navy the authority to fire first when threatened.
D) It led Roosevelt to demand assurances from Hitler that such an attack would never occur again.