In One Episode of the 1960s Television Sitcom, Gilligan's Island

In one episode of the 1960s television sitcom, Gilligan's Island, the famous "professor" constructed voltaic cells to use as substitutes for their radio's dead batteries.A single D-cell has an emf of 1.5 V.Which scraps of metal from their damaged boat, the Minnow, could best be used to create a 1.5 V voltaic cell? Assume that coconuts make great beakers and that seawater is a terrific electrolyte.

A) silver anode and lead cathode
B) aluminum anode and lead cathode
C) iron anode and aluminum cathode
D) aluminum anode and silver cathode
E) lead anode and silver cathode