Answer:
D. American citizens and the US Congress
Step-by-step explanation:
In his speech addressing the attack at Pearl Harbor which occurred on December 7, 1941, the American citizens and the United States Congress were the two major audience to whom this speech was directed to. The President said that the Americans knew the implications of this attack and since he represented the will of the people, he directed Congress to declare a state of war with the Japanese government.
This speech was listened to by many people in the world. But since it directly affected Americans, they were the main audience.