Which of the Following Statements Regarding Band Theory and Solid-State

Which of the following statements regarding band theory and solid-state bonding in lithium is NOT correct?

A) The 2s orbitals on lithium atoms overlap to form molecular orbitals.
B) Many lithium atoms are required for the overlap of atomic orbitals to form continuous bands of energies.
C) The metallic bonds holding lithium atoms together in the solid are weak.
D) The valence band and the conduction band created by the overlap of atomic orbitals are both half full.
E) Lithium's conductivity is explained by the proximity of unoccupied orbitals in the conduction band to the occupied orbitals in the valence band.