[单选题]
A monochromatic light is incident on th6c4;m zc;ggrq7uk cem-k0 e.he surface dv3. egp6mcl,o a4yc; of a metal with work function 2.50 eV. If a 1.0-V stopping potential is required to make the photocurrent zero, what is4alc63cp .o gm edy,v; the wavelength of light?
A. $354 \; nm$
B. $423 \; nm$
C. $497 \; nm$
D. $744 \; nm$
