Oxygen-demanding waste are considered to be a water pollutant because they?

A.

deplete oxygen which is necessary for the survival of aquatic organism

B.

increase oxygen which is necessary for survival of aquatic organism

C.

increase other gaseous substances which are necessary for the survival of aquatic organisms

D.

deplete other gaseous species which is necessary for the survival of aquatic organisms

Correct answer is A

No explanation has been provided for this answer.