Which one is CORRECT about developing beam equations using s

Which one is CORRECT about developing beam equations using singularity functions? The order of the singularity function related to a concentrated load is 3 in the equation of the slope. The constants of integration in the equations of shear force, moment and slope are zeroed by applying boundary conditions. The deflection of the beam can be derived as one single equation which satisfies all the boundary conditions. The direction of the unknown support reactions must be considered in the positive direction of the coordinate systems. The values of support reactions for all structures can be found by applying boundary conditions to the equations of shear force and moment.

Solution

ans is C. as there is only one bending moment equation so one deflection equation also, from ehich all the boundary conditions can be derived