In the 1960s and 1970s, Lake Erie Was Choked with Plants

In the 1960s and 1970s, Lake Erie was choked with plants and algae because of excess nutrients from farming and urban areas.As the algae died, bacterial decomposition led to oxygen depletion and a nearly "dead" lake.Now, the Gulf of Mexico is also receiving excess nutrients from agricultural and sewage runoff and is suffering from eutrophication.A major difference between these two examples is that Lake Erie

A) was affected by human activity.
B) was affected by excess nutrients.
C) suffered from eutrophication.
D) is a freshwater ecosystem.
E) suffered from decomposition and oxygen depletion.