Consider a linear programming problem whose initial simplex tableau is: \begin{tabular}{cccccccccc} \hline Row # & Basic & $\mathrm{P}$ & $\mathrm{x}$ & $\mathrm{y}$ & $\mathrm{z} $ & $\mathrm{u} $ & $\mathrm{v}$ & $\mathrm{w}$ & RHS \hline $\mathrm{R} 1$ & $u$ & 0 & 2 & $-6$ & 2 & 1 & 0& O & 8 \hline $\mathrm{R} 2$ & $v$ & O & 6 & $-2$ & 3 & 0& 1 & 0 & 10 W \hline $\mathrm{R} 3$ & $\mathrm{w} $ & O & 4 & $-4$ & 1 & 0& 0 & 1 & 16 \hline $\mathrm{R} 3$ & $\mathrm{P}$ & 1 & $-8$ & $-12$ & 4 & 0 & 0 & 0 & 0W \hline \end{tabular) where $x, y$ and $z$ are the decision variable. If the column given by variable $y$ should be selected next for pivot operations, which row should then be selected as the pivot row? A. Row R1 B. Row R2 C. Row R3 D. Row R4 SS.SP. 275