How Does the Wave Model of Electrons Orbiting the Nucleus

Multiple Choice

How does the wave model of electrons orbiting the nucleus account for the fact that the electrons can have only discrete energy values?

A) Electrons are only able to vibrate at particular frequencies.
B) When an electron wave is confined,it is reinforced only at particular frequencies.
C) The energy values of an electron only occur where its wave properties and probability clouds are mutually reinforcing.
D) The wave model accounts for the types of orbitals an electron may occupy,not it's energy levels.