What is the main problem with this introduction paragraph? Niagara Falls is on the border between the United States and Canada. The best thing about visiting Niagara Falls is the Cave of the Winds tour. There are many fun ways to explore the park, but this tour gets visitors closest to the falls. Some may prefer riding the trolley or taking a boat ride in the lower falls, but the Cave of the Winds tour is where the real excitement is.

A.
It does not restate the main points of the essay.

B.
The thesis statement is unclear.

C.
The hook does not relate to the topic.

D.
It includes opinions instead of just facts.