Answer:
The correct answer is A. The significance of the terror attack on the USS Cole in 2000, other than the obvious harm to US forces, was that it demonstrated that Bin Laden and Al-Qaeda were not intimidated by the United States' reprisal for their terrorist acts.
Step-by-step explanation:
The attack on USS Cole was a terrorist attack on the US Navy ship USS Cole on 12 October 2000 in the port of Aden in Yemen, in which seventeen Americans lost their lives. The attack was perpetrated by the Al-Qaeda terror group.
The attack had a clear message: Al Qaeda was willing to carry out a large-scale and sustained war against the United States, and was not intimidated by American reprisals. This was confirmed with the Attacks of September 11, a year later.