The Definite Energies Associated with Specific Wavelengths in the Emission

The definite energies associated with specific wavelengths in the emission spectrum of atomic hydrogen suggest that

A) electrons have a smaller rest mass than photons.
B) photons have a smaller rest mass than electrons.
C) energy states of the electron in the hydrogen atom are quantized.
D) atomic hydrogen is more stable and has a lower potential energy than molecular hydrogen.
E) the potential energy of electrons in the atom can have any arbitrary value over a period of time, but the kinetic energy may only have certain specific values.