Answer: C
Step-by-step explanation:
In the speech Roosevelt specifically mentions "unprovoked and dastardly attack" and "I regret to tell you that very many American lives have been lost." Both of those quotes point to how the attack being without warning and violent which matches with answer C
He never mentions trade or allies so it can't be A
He never mentions his frustrations with congress so it's not B
His speech is about defending the US and not foreign empires so it is not D