Which of the following geographic features was an obstacle for boats traveling down the Ohio River in the 19th century? A.
Cumberland Lake
B.
Wilderness Road
C.
the Falls of Ohio
D.
Black Mountain

Option: C. the Falls of Ohio

Explanation:

The falls of Ohio was an obstacle for steamboats travelling down the Ohio River in the 19th century because of its geographic features which included a series of rocky rapids. The falls of Ohio at Louisville formed the obstacle to navigation on the river because of limestone shoals that created rapids. Smaller boats were able to navigate the falls in high water, but larger steamboats always ran the risk of damage.

answer; i believe that the correct answer is rapid and subsequently slow down;

answer; all of the answers are correct;