Based on the equations below, which metal is the most active? \begin{array}{l} \quad P b\left(N O_{3}\right)_{2}(a q)+N i(s) \rightarrow N i\left(N O_{3}\right)_{2} \\ (a q)+P b(s) \end{array} \begin{aligned} & \mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}(\mathrm{aq})+\mathrm{Ni}(\mathrm{s})

\rightarrow \mathrm{Ni}\left(\mathrm{NO}_{3}\right) 2 \\ (\mathrm{aq})+\mathrm{Cu}(\mathrm{s}) \end{aligned} Pb(NO3)2 (aq) + Ag (s) → No reaction A. N В. Ni С. Ag D. Pb E. Cu