Well..as far as i learned from my knowledge the answer would be in the past, the military and the FBI have prevented a number of terrorist attacks.
Secondly, wasn't there suppose to be an option answers for your question ?
Answer:
The correct answer might be A.
Now I'm not 100% sure here but C is your best bet
The French and Indian War impacted the colonies economically. As a result of the war, the British were able to expand their influence in the Ohio Valley. This meant the British would profit even more from the lucrative fur trade now that France had left the area.
Answer:
The attack on Pearl Harbor
Explanation:
The attack on Pearl Harbor was a strike on U.S. from Japan but they had done this because although the U.S. had stayed neutral they were still giving Great Britain and other Ally powers supplies.