One of the most harmful consequences of runoff pollution is algae overgrowth. Algae overgrowth occurs when which of the following happens?
A. Algae overgrowth occurs when oil runs into the water, causing algae to overproduce.
B. Algae overgrowth occurs when oil runs into the water, causing algae to under produce.
C. Algae overgrowth occurs when too many nutrients are in the water, causing algae to overproduce.
D. Algae overgrowth occurs when too many nutrients are in the water, causing algae to under produce.

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