There are two piles of dirty clothes over there, _____ are they? [ ]

A. Which

B. Who

C. What

D. Whose

金融IC借记卡电子现金账户可以办理以下哪些业务（）。

A.挂失

B.电子现金明细查询

C.电子现金余额查询

D.转账

E.POS机消费