What can deplete oxygen in a body of water? 

A)  viruses and parasitic worms 
B)  sediment and suspended matter 
C)  organic compounds such as oil, plastics, solvents, and detergents 
D)  organic wastes

Organic wastes, such as sewage or animal manure, can lead to an increase in bacteria and other microorganisms that consume oxygen during decomposition. This can cause oxygen depletion in the water and harm aquatic organisms. Viruses and parasitic worms are not typically associated with oxygen depletion in bodies of water. Sediment and suspended matter can reduce light penetration and harm some organisms, but do not directly impact oxygen levels. Organic compounds such as oil, plastics, solvents, and detergents can harm aquatic environments in other ways, but do not necessarily lead to oxygen depletion.