In which situation would artificial insemination most likely be used A. There is a blockage in the fallopian tubes.
OB. A man's testicles have not properly descended, lowering
Oc. A woman's ovaries do not release any eggs.
OD. The mucus that helps the sperm travel to the uterus ist
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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.

and i oop

explanation: