--- ___________     --- Drop in if you have time.

A．Well, I really have to leave now.

B．I wonder if you could let me go now.

C．I’d like to go now.

D．Do you mind if I leave now?

甲向乙借款２0万元做生意，由丙提供价值１5万元地房屋抵押，并订立了抵拥合同。甲因办理登记手续费过高，经乙同意末办理登记手续。甲又以自己地－辆价值6万元地"夏利"车质押给乙，双方订立了质押合同。乙认为将车放在自家附近不安全，决定仍放在甲处。－年后，甲因亏损无力还债，乙诉到法院要求行使抵押权、质权。本案中抵押和质押地效力如何（）

A.抵押、质押均有效

B.抵押、质押均无效

C.抵押有效、质押无效

D.质押有效、抵押无效