[单选题]
When light of wavelength 350 nm is incident on a me 6mglykv6k//;vy z;qjtal surface, the stopping x )gar2p d2yi;potential of the photoelectrons is 0.500 eV. What is thp )dxa2 ;gyir2e threshold frequency?
A. $3.47 \times 10^{14} \; Hz$
B. $3.74 \times 10^{14} \; Hz$
C. $4.73 \times 10^{14} \; Hz$
D. $7.34 \times 10^{14} \; Hz$