AgBr sol was prepared by mixing 0.08mol/dm3 NaBr solution and 0.10mol/dm3 AgNO3 solution of the same volume,and the following electrolyte solutions of the same concentration were added respectively. What is the order of the ability of agglomeration and sedimentation as follows? (A) KCl (B)Na2SO4 (C)MgSO4 (D)Na3PO4