For an organism to be considered to have the greatest level of fitness A. it must be the strongest.
B. it must survive and reproduce.
C. it must be the smartest.
D it must live the longest.

B

Explanation:

An organism that can survive in the environment and produce enough offspring.

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.

true is the answer : )