— No one answered when I phoned this morning. Where were you?

— I         for teeth in the dental clinic.

A．was being treated

B．have been treated

C．was treated

D．treated

中国人民银行在反洗钱调查过程中，可以依法采取临时冻结措施，但临时冻结不得超过（）。

A.24小时

B.48小时

C.三天

D.七天