The correct answer is C. Sublimation.
Sublimation is the process of conversion of a solid directly into a gas without passing through the intermediate liquid state. It is a phase transition that occurs at temperatures and pressures below the triple point, at which the solid, liquid, and gas phases can coexist.
Evaporation is the process of a liquid changing into a gas or vapor. It is a surface phenomenon that occurs when molecules at the surface of a liquid have enough energy to escape the attraction of the other molecules and enter the gas phase.
Condensation is the process of a gas changing into a liquid. It is the opposite of evaporation and occurs when the gas molecules lose energy and are able to form bonds with each other.
Distillation is a process of separating a mixture of liquids by boiling them and then collecting the vapors. The vapors are then condensed back into liquids, and the liquids are collected separately.