The Difference Between the "Ground State" and an "Excited State

The difference between the "ground state" and an "excited state" for a hydrogen atom is

A) the atom can radiate when it is in an excited state, but not when it is in a ground state.
B) the excited state has more energy.
C) Both of the above.
D) a ground state's matter field is a standing wave but an excited state's matter field is not a standing wave.
E) All of the above.