When domestic sewage mixes with river waterA. Small animals like rats will die after drinking river waterB. The increased microbial activity releases micronutrients such as ironC. The increased microbial activity uses up dissolved oxygenD. The river water is still suitable for drinking as impurities are only about 0.1%

When domestic sewage mixes with river waterA. Small animals like rats

1.	When domestic sewage mixes with river waterA. Small animals like rats will die after drinking river waterB. The increased microbial activity releases micronutrients such as ironC. The increased microbial activity uses up dissolved oxygenD. The river water is still suitable for drinking as impurities are only about 0.1%
Answer» Correct Answer - C When domestic sewage mixes with river water increased microbial activity uses up dissolved oxygen.

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