Ships....hope this helps!
A and C are the correct answers.
If you're looking for the name of someone who studies the stars it would be an astronomer.
Answer:
I believe the answer is D sry if im wrong
Explanation:
The September 11 attacks were a series of four coordinated terrorist attacks by the Islamic terrorist group al-Qaeda against the United States on the morning of Tuesday, September 11, 2001. This attack was unknown. No one but the attackers had any idea that this was going to happen so it was impossible to prevent. They didn’t have enough security to protect us against it.
