When a molecule of nad��� (nicotinamide adenine dinucleotide) gains a hydrogen atom (not a proton), the molecule becomes; a) dehydrogenated.; b) oxidized.; c) reduced.; d) redoxed.; e) hydrolyzed.

significant amounts of nitrogen oxides, carbon monoxide, and other pollution

explanation:

passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. in 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.

sadness is not good

explanation:

i think it’s c but i might be wrong. if i am let me know! have a good rest of your day as well!