Choose the best description of a covalent bond from the choices below.
A. Two water molecules interact due to partial charges on the oxygen and hydrogen atoms.
B. A magnesium donates electrons and forms bonds with two chloride ions.
C. A bond forms between a hydrogen from one molecule and a nitrogen from another molecule.
D. A positive potassium ion forms a bond with a negative chloride ion.
E. A nitrogen atom shares electrons with three hydrogen atoms