What Is the Difference Between Covalent Bonds and Ionic Bonds

What is the difference between covalent bonds and ionic bonds?

A) Covalent bonds involve the sharing of protons between atoms, and ionic bonds involve the sharing of electrons between atoms.
B) Covalent bonds involve the sharing of neutrons between atoms, and ionic bonds involve the sharing of electrons between atoms.
C) Covalent bonds involve the sharing of electrons between atoms, and ionic bonds involve the electrical attraction between atoms.
D) Covalent bonds involve the sharing of protons between atoms, and ionic bonds involve the sharing of neutrons between atoms.
E) Covalent bonds involve the transfer of electrons between atoms, and ionic bonds involve the sharing of neutrons between atoms.