The Figure Shows Two Different Orientations of a Proton in a Magnetic

Multiple Choice

The figure shows two different orientations of a proton in a magnetic field. Which orientation is at higher energy?

A) a
B) b
C) Both are at the same energy, and there is no other orientation at higher energy.
D) Both are at the same energy, but if the spin vector were perpendicular to the magnetic field the energy would be higher.
E) Both are at the same energy, but if the spin vector were perpendicular to the magnetic field the energy would be lower.