Concerning the Process of Separating of a Solid Substance into Its

Concerning the process of separating of a solid substance into its component units (molecules or ions) ,

A) the process is exothermic and the potential energy increases.
B) the process is exothermic and the potential energy decreases.
C) the process is endothermic and the potential energy increases.
D) the process is endothermic and the potential energy decreases.
E) the process is endothermic and occurs with no change in potential energy.