Ain't in ur following ig..wait, will follow u in a sec :) Then went be even Stephen (y do u want ppl to report it btw?)
Answer:
I'm pretty sure the answer is A
C is not an example of evolution so that is your answer
A common way that humans pollute water is through the addition of nutrients (fertilizers and sewage) to water as nonpoint source pollution. These added materials are full of nitrogen and phosphorus, two nutrients that encourage the growth of aquatic producers, such as algae.
