Insulators Are Poor Conductors of Electricity Because

Multiple Choice

Insulators are poor conductors of electricity because

A) there is a small energy gap between the valence band and the next higher band in which electrons can collect.
B) there is a large energy gap between the valence band and the next higher band in which electrons can collect.
C) the valence band has a few vacancies for electrons.
D) the valence band is only partly full.
E) None of these is correct.