It’s c cause I know and I was just too lazy to type the word lol
The answer is carbohydrate
I can say for certain that it's really probably not A. or D.
As for B. or C., I'd say C.
Explanation:
they differ because it doesn't hurl multi-cellular organisms if one cell dies but if a single celled organism looses its one cell that organism will die.
Emphasis made of finding cost effective ways to reduce air pollution.
