The ozone layer sits near the top of Earth's atmosphere and protects us from the sun's harmful ultraviolet rays. But ozone is dangerous when it's closer to ground level. Which statement is true about ground-level ozone? A.
It contributes to nutrient pollution.
B.
It directly causes acid rain.
C.
It is the main component of smog.

Hey!

Your answer is C. It is the main component of Smog

Explanation:

Its C because Smog is LOW LEVEL OZONE mixed up with particulate matter (pollution in other words), That's what gives it its distinct smell...it also contains  Sulphur Dioxide, Nitrogen Oxides and Carbon Monoxide.

I HOPE THIS HELPED YOU! :D

a. life is life.

because life is not always nice.

and life is not always fun and cute.

i agree d is most definitely correct!