Prior to settlement, water flowed clear from the maumee river to lake erie. now, the extensive grid of ditches and tile lines:

a. have increased flows in the river.
b. have made the river more turbid.
c. have increased nutrient inputs to the river.
d. all the above

D. All the above

Explanation:

Lake Erie is the fourth-largest lake by surface in the north America and is located along the boundary of the Canada and the united states, and has native people that live along the southern shore. A freshwater lake that was originated by the leftover glacier water. It has a max length of 241 miles. Over the years the quality of the water has been declined due to the pollutants that were released by the extensive grid lines and the use of the heavy industrial also polluted the water bodies this lead to the rise in the nutrient inputs to the river and thus destroying the river ecosystem.

Where are the statements so i can ?

Answer collision and mountain formation;