WILL GIVE BRAINLIST what causes the overgrowth of algae and cya bacteria in an aquatic environment?
A. Decaying plants in the area real easing the nutrients that they need to grow
B. An absence of other plants leaves room for them to grow
C. Weathering of rocks that dissolves phosphorus into the water
D. excess phosphorus from the runoff of fertilizer and animal waste that end up in ponds?
Answer asap for brainlist