So that the mircrobes present could get help to perform anariobïc repiration (respiration without oxygen).....as it helpfull for decomposing the sewage waste ...also to prepare sideproduct called metane gas
The fragrant organic compounds found in many flowers that contain a carbonyl group bonded to a carbon atom and a hydrogen atom are called aldehydes.
Can not be D or B and A is not enough so C is right.
Not sure what that would be I would check the definitions
