A rigid body is in equilibrium state under the coplanar force system. Which set of equilibrium equations are not independent of each other?【图片】
A.
S X = 0, S mO(F) = 0, S mA(F) = 0
B.
S mO(F) = 0, S mA(F) = 0, S mB(F) = 0
C.
S mA(F) = 0, S mC(F) = 0, S Y = 0
D.
S X = 0, S mA(F) = 0, S mB(F) = 0