The longest wavelength of a photon that can be emitted by a hydrogen atom, for which the final state is n = 10, is closest to:
A. 1.7 x 10^4 nm
B. 5.3 x 10^4 nm
C. 9100 nm
D. 3 x 10^4 nm
E. 2.2 x 10^4 nm