A.MSB>MPB B.MSB<MPB C.MSC>MPC D.MSC<MPC
A.MSB>MSC B.MSB<MSC C.MSB>MPB D.MSC<MPC
A.MSB>MPB且MSC>MPC B.MSB>MPB且MSC=MPC C.MSB<MPB且MSC<MPC D.MSB=MPB且MSC>MPC