Question

Which is true of all covalent compounds?

A)
They share electrons in bonds.

B)
They are electrically charged.

C)
They are good conductors in water.

D)
They are usually made of a metal and a nonmetal.

Answer 1

They share electrons in bonds.

Answer 2

By defining what a covalent bond is, you should be able to arrive at your answer (which is what @aroub just posted).