A cylindrical conductor of total length \(2L\) consists of two joined uniform segments of length \(L\) made of the same ohmic material of resistivity \(\rho\). Segment 1 (from \(x = 0\) to \(x = L\)) has cross-sectional area \(A\), and Segment 2 (from \(x = L\) to \(x = 2L\)) has cross-sectional area \(2A\). The end at \(x = 0\) is connected to the positive terminal of an ideal battery of potential difference \(\mathcal{E}\), and the end at \(x = 2L\) is connected to the grounded negative terminal (\(V = 0\)). Which of the following graphs best represents the electric potential \(V\) as a function of position \(x\) along the conductor?