Why Does the Stability of a Noble Gas Electron Configuration

Why does the stability of a noble gas electron configuration contribute to the formation of covalent bonds?

A) Ionic bonds are called electron transfer bonds and covalent bonds are called electron sharing bonds
B) Noble gases are found in Group 8A/18 on the periodic table
C) Electrons occur in pairs in covalent bonds
D) Ionic crystals are held together by electrostatic forces and molecular compounds are not
E) The tendency toward a complete octet of electrons in a bonded atom reflects the natural tendency for a system to move to the lowest energy state possible