A cylindrical metal rod is thermally insulated along its sides. Its ends are maintained in contact with two large thermal reservoirs at constant absolute temperatures \(T_H\) and \(T_C\), where \(T_H > T_C\). The system is in a steady state, with heat conducting through the rod at a constant rate \(P = \dfrac{\Delta Q}{\Delta t}\). Which of the following correctly identifies the rate of change of entropy of the rod, \(\dfrac{\Delta S_{\text{rod}}}{\Delta t}\), and the net rate of change of entropy of the complete system (the two reservoirs plus the rod), \(\dfrac{\Delta S_{\text{total}}}{\Delta t}\)?