In order for carbon dioxide gas to enter the air from dry ice, what must happen to the dry ice?
A It must gain energy
B. It must boil
c. It must increase in pressure
D. It must undergo an exothermic change

probably D. It must undergo an exothermic change

Explanation:

because of the definition of exothermic change

-An exothermic phase change releases heat energy into its environment. These changes include freezing and condensation. When a substance loses heat energy, the attractive forces between atoms slow them down, reducing their mobility.

also dry ice is very..very cold -109º F (-79º C),

i'm wiling to try and you : )