What response is Roosevelt most likely trying to elicit from the American people in his "Pearl Harbor Address to the Nation"?

A. He is trying to explain to Americans how to properly prepare for an attack on U. S. soil.

B. He is trying to prove his credibility as Commander in Chief for the war.

C. He is trying to shock Americans with news of the attack by Japan.

D. He is trying to inform Americans of the Allies's successes in the war effort.