Which Statement Summarizes the Distinction Between Nonpolar and Polar Covalent

Which statement summarizes the distinction between nonpolar and polar covalent bonds?

A) The electrons are more evenly and symmetrically distributed in orbit among atoms in a nonpolar covalent bond.
B) Polar covalent bonds are formed when the atoms gain or lose electrons to bond, and become oppositely charged ions.
C) The difference in electronegativity of the atoms in a nonpolar covalent bond is very large.
D) The electrons are more evenly and symmetrically distributed in orbit among atoms in a polar covalent bond.