I would have to say the answer is C.
A is incorrect since hydrogen is not an air pollutant.
B is incorrect because ozone is most definitely one of the top.
And D has cyanide which is a chemical for suicide during wars.
Hope this helps!
Answer:
B
Explanation:
The changed protein connects differently, but its function doesn't change.
Answer:
you can live longer than people who smoke you can also live life without lung-cancer, mouth-cancer, thought-cancer ect.
Explanation: