20 POINTS! PLZ HELP ME. :-)

I believe the answer is A

Explanation:

the answer is 3.1 his answer is wrong mines is right

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d