Which one or more of the following increase(s) when the electron in a hydrogen atom undergoes a transition from the 1s-orbital to a 2p-orbital?
(a) number of values of the quantum number l
(b) value of the quantum number n
(c) average distance between the electron and the nucleus
(d) the potential energy of the electron (becomes less negative)
(e) all values a, b, c, and d increase