Ionic, Covalent network, Covalent discrete molecular, and metallic - Place ABCD into the approproate category?

A : covalent discrete molecular
This is because of the low boiling point and melting point.

B : metallic
This is because it is good conductor of electricity in both solid and liquid states.

C. ionic
This is because it does not conduct electricity in solid state, but conducts electricity in liquid state.

D. covalent network
This is because it has high boiling point and boiling point, and does not conduct electricity in both solid and liquid states.