[单选题]
When light of wavelength 350 nm is (3nx a/fzfzs *vvm5u. x9b. crincident on a metal dg 4r36a mndgyv u)o1;surface, the stopping potential of the photoelectrons is 0.500 eV. What is the threshold frequmvugrdo1 4n) ga;3d6yency?
A. $3.47 \times 10^{14} \; Hz$
B. $3.74 \times 10^{14} \; Hz$
C. $4.73 \times 10^{14} \; Hz$
D. $7.34 \times 10^{14} \; Hz$