— Could I borrow your car for a while?

— ______. I won't use it today.  [ ]

A. By all means

B. Never mind

C. You are welcome

D. Of course you could

目前，我国公民如要进行证券交易需事先在( )开立证券账户。

A．证券登记结算机构
B．中国证监会
C．中国人民银行
D．证券交易所