Extracted text: Using the slope-deflection method, one of the following is a valid equilibrium ?equation for the structure shown below D 30 kN/m 150VA kNm m C اخترأحد الخیارات a. M,+M +M+150=0 O 'A b. M,,+Men+M-n=0 CB АВ EB c. M+Mpe+Mpr=0 BA 'BC 'BE d. McB+McD=0 O d. Men+Men=0