A cylindrical conducting rod of length \(L\) and uniform cross-sectional area \(A\) carries a steady current \(I\) flowing in the \(+x\)-direction from \(x = 0\) to \(x = L\). The electric potential along the rod is fixed at \(V(0) = V_0\) and \(V(L) = 0\). The resistivity of the material varies linearly along its length according to \(\rho(x) = \rho_0 \left(1 + \dfrac{x}{L}\right)\), where \(\rho_0\) is a positive constant. Which of the following best describes the graph of the electric potential \(V(x)\) as a function of position \(x\) for \(0 \le x \le L\)?