Niagara falls straddles the border between which two countries?

Niagara Falls (/naɪˈæɡrə/) is the collective name for three waterfalls that straddle the international border between Canada and the United States; more specifically, between the province of Ontario and the state of New York. They form the southern end of the Niagara Gorge.

Answer the above statement is correct (true);

The answer for your problem would be a. 7