Which of the Following Is an Unintended Ecological Consequence of Human

Multiple Choice

Which of the following is an unintended ecological consequence of human waste that is processed in water treatment facilities, and then discharged as effluent in rivers near cities?

A) eutrophication of major river systems
B) sexual differentiation abnormalities in aquatic organisms
C) PCB accumulation in river systems, wetlands, and lakes
D) temperature fluctuations that cause rivers to cool excessively