[单选题]
The electron in the ground state: ig* 3m-dxc,hostsm- of a hydrogen atom abso: kp-4rwf;jcjo8o 2zn rbs a certain amount of energy. The diagram shows some of the energy levjnj z2-ckf 8;:orwpo4els of the hydrogen atom. At which state would the electron be if it absorbs 12.09 eV of energy?
A. At ground state.
B. First excited state.
C. Second excited state.
D. Third excited state.
