Select the correct answer.

Which statement best explains how electrons form a covalent bond in a molecule?

A.

A pair of electrons splits so that each atom gets one electron.

B.

A pair of electrons belongs to two atoms at the same time.

C.

A pair of electrons is transferred from one atom to another atom.

D.

A pair of electrons moves from a lower energy level to a higher energy level.

E.

A pair of electrons drifts freely from one molecule to another.