What Is the Difference Between Covalent and Ionic Bonds

What is the difference between covalent and ionic bonds?

A) Covalent bonds are the sharing of electrons, whereas ionic bonds are the sharing of protons.
B) Covalent bonds involve the attraction between slightly charged molecules, whereas ionic bonds involve the attraction between two fully charged ions.
C) Covalent bonds involve the sharing of neutrons, whereas ionic bonds involve the attraction of slightly charged atoms.
D) Covalent bonds are the sharing of electrons, whereas ionic bonds involve the transfer of electrons from one atom to another.