Atmosphere of Mars Questions?

Question

The conditions in the current atmosphere of Mars are

A) such that water cannot exist in any form on or near the surface of Mars
B) such that one expects a substantial layer of Ozone to form
C) such that liquid carbon dioxide can flow freely on Mars
D) such that liquid water can flow freely on the surface of Mars

this is my reasoning for each answer:
A: there is frozen water on mars
B: dont u need oxygen and am not sure if theres oxygen on mars
C: not sure about this one
D: obviously false

please correct me and help me figure this one out

X, can u please explain more

Answer 1

I agree with you. There is plenty of water ice at the poles (the polar ice caps are made of frozen water and frozen CO2) and water ice in the regolith. You need lots of oxygen for ozone, so B is definitely false. There's no liquid carbon dioxide on Mars, only gaseous and solid forms. There's no liquid water on Mars either. If I had to choose one of those as an answer, I'd choose A, but technically none of the answers is correct.

Answer 2

the martian atmosphere is 95% CO2 and it's a lot thinner than the earth's atmosphere.