For an unbiased p-n junction, the energy at the bottom of the conduction band on the n side is:
A. higher than the energy at the bottom of the conduction band on the p side
B. lower than the energy at the bottom of the conduction band on the p side
C. lower than the energy at the top of the valence band on the n side
D. lower than the energy at the top of the valence band on the p side
E. the same as the energy at the bottom of the conduction band on the p side
