For a simply supported beam under uniformly distributed load, the free body diagram as well as the shear and bending moment diagrams are illustrated below: D RD=0.5wL 0.5wL 0 -0.5wL 0.125wL2 0 Shear Diagram 0.5L R 0.5wL Moment Diagram 0.5L Which of the following is true? The bending moment diagram has maximum slope at the beam's center, i.e., x = 0.5 L The bending moment diagram has a constant slope The shear diagram has a constant slope O The shear diagram has zero slope