Final answer:
Option C. Solid sodium chloride and Option D. molten calcium chloride are capable of conducting electricity due to the free movement of ions in their respective states.
Step-by-step explanation:
Out of the given substances, solid sodium chloride and molten calcium chloride are capable of conducting electricity.
Solid sodium chloride, also known as table salt, conducts electricity when it is dissolved in water or molten (melted). In its solid form, the ions in sodium chloride are held in a rigid crystal lattice, preventing the movement of charged particles.
On the other hand, molten calcium chloride, which is a type of ionic compound, can conduct electricity because the ions are free to move in the molten state.