Which of the Following Metals Would Be an Appropriate Choice $\varPhi$

Which of the following metals would be an appropriate choice for the construction of a photon detector for 550 nm light?

A) sodium ( $\varPhi$ = 2.9 *10^-19 J)
B) rubidium ( $\varPhi$ = 3.5 *10^-19 J)
C) barium ( $\varPhi$ = 4.3 *10^-19 J)
D) gold ( $\varPhi$ = 8.2 *10^-19 J)
E) platinum ( $\varPhi$ = 9.1 *10^-19 J)