Which substance has the following properties?

•     Low melting point

•     Very soluble in water

•     Does not conduct electricity when molten

A.     Glucose, \({{\text{C}}_{\text{6}}}{{\text{H}}_{{\text{12}}}}{{\text{O}}_{\text{6}}}\)

B.     Silicon dioxide, \({\text{Si}}{{\text{O}}_{\text{2}}}\)

C.     Sodium chloride, NaCl

D.     Tetrachloromethane, \({\text{CC}}{{\text{l}}_{\text{4}}}\)

A