[单选题]
An electron has a wavelength dw+i ub f54s oa;. +nfrtutrq,- r.9qkkc2lr kgb hht;i.)b3 7of 0.123 nm. What is its energy in eV? (This energyckhbgk2 b;37rt)hli. is not in the relativistic region.)
A. $20 \; eV$
B. $60 \; eV$
C. $80 \; eV$
D. $100 \; eV$