下列属于外资银行流动性监管指标的是（）。

A.单一客户授信集中度

B.不良贷款拨备覆盖率

C.营运资金作为生息资产的比例

D.贷款损失准备金率

—Could you please tell me ________? 　

—Sorry, I don't know. I was not at the meeting. 　[ ]

A. what the headmaster says at the meeting

B. what the headmaster said at the meeting 　　

C. what does the headmaster say at the meeting

D. what did the headmaster say at the meeting