The correct option is A Both A and C
Electricity generating units
Electricity generating units like thermal power plants use water as a cooling agent. This water, when released back into the water bodies, results in the overall increase in the temperature of the water bodies. Thus resulting in water pollution.
Domestic sewage
Domestic sewage is the wastewater released from human activities in households like cooking, bathing, etc.
Final answer
(D) Both A and C