What is included in key waterways in the south during the civil war?

a. the mississippi, ohio, and tennessee rivers.

b. the great lakes and the mississippi river.

c. the ohio, tennessee, and columbia rivers.

d. the great lakes and the columbia river.

"The Mississippi, Ohio, and Tennessee rivers" are the ones among the following choices given in the question that is included in key waterways in the South during the Civil War. The correct option among all the options that are given in the question is the first option or option "A". I hope the answer has helped you.