[单选题]
An electron has a wav:*hs9 l4trvfz) rfcfbh5v8y/ elength of 0.123 nm. W vjn11p,x/ im/ni.jt,iuu0ni :id+x/xh ouv0hat is its energy in eV? (This energy is not in the relativistic regiop1:u jo.hin x/i1j 0/v/i xt, ui0ud,mv+x innn.)
A. $20 \; eV$
B. $60 \; eV$
C. $80 \; eV$
D. $100 \; eV$