The Ionization Energy for a H Atom 1s Electron Is

The ionization energy for a H atom 1s electron is 2.18x10^-18 J and that for a 2p electron is 0.545x10^-18J.

A) The 2p electron is shielded by the 1s electron, and as a result IE is lower.
B) A 2p electron is further from the nucleus than a 1s electron would be, and as a result IE is lower.
C) The 2p electron is shielded by the 1s electron and will be more easily removed.
D) The 1s electron is closer to the nucleus than a 2p electron would be, therefore it is easier to remove the 1s electron.
E) Electrons never occupy 2p orbitals in hydrogen.