Which, if any, of the following metals would be capable of acting as a sacrificial anode when used with an iron pipe? Iron EoFe-0.44 V; all E° values refer to the standard M2+/M reduction potentials. O Cd, E -0.40 V O None of these metals would be capable of acting as a sacrificial anode with iron. O tin, Sn, E° =-0.14 V O chromium, Cr, E?-0.74 V O cobalt, Co, E -0.28 V O copper, Cu, Eo 0.15 V