Which Statement Regarding the Electronic Structure of Solids Is Not

Which statement regarding the electronic structure of solids is not correct?

A) The band theory of solids is like molecular orbital theory in that the electronic wave function is delocalized to some extent over all the constituent atoms.
B) In solids that are electrical insulators, there is a large gap between a filled valence band and a vacant conduction band.
C) In semiconductors, the gap between the valence band and conduction band is small, so a few electrons have sufficient thermal energy to be found in the conduction band.
D) n- and p-type semiconductors can be produced by doping a semimetal with an element from a different group.
E) Germanium doped with arsenic is a p-type semiconductor.