I'm confused at how to approach this question (in a chapter on phase transitions) since it is so general.
My first instinct is to say that is depends on the materials P-T diagram and the temperature, such that one would need to check in what state would the specific materiel be for $P = 0$ and a specific temperature. I would then conclude that the material would undergo a phase transition to that state.
But, since the question is so general, I assume the answer would be the same for all solids. Furthermore, because the follow-up question concerns the solid-gas coexistence curve.