Use the Following Figure for the Next Two Questions $\times$ 10^-19 J

Multiple Choice

Use the following figure for the next two questions.
Apparatus for studying the photoelectric effect
-The work function of the material being investigated is 3.5 $\times$ 10^-19 J.The battery is set at 1.5 V.What is the longest wavelength of light needed to produce an electric current from the cathode (C) to the anode (A) ?

A) 337 nm
B) 354 nm
C) 620 nm
D) 827 nm
E) None of these is correct.