pyq/2013/csat/38

The passage given above refers to the conversion of "pollutant to fertilizer." What is the pollutant and what is the fertilizer in this context?

(A) The decomposed organic component of slurry is a pollutant and microorganisms in soil constitute fertilizer.

(B) Discharged agricultural slurry is a pollutant and decomposed slurry in soil is fertilizer.

(C) Sprayed slurry is a pollutant, and watercourse is fertilizer.

(D) None of the above expressions is correct in this context.