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.

Covalent bonding also known as molecular bonding is a chemical bonding that involves sharing of electrons. it occurs between non metals using their electronegetivities.  so the answer is A

All covalent compounds share electrons in bonds. They are made of two or more nonmetals which share electrons. They do not form ions, charged particles, so they are not good conductors in water. 

Therefore,
The best answer is option A). They share electrons in bonds.