一般情况下，证券公司不需要专门组织证券以备交收。不过（）存在例外。

A.深圳A股市场

B.深圳B股市场

C.上海A股市场

D.期货市场

Which of the following statements about stock valuation is least likely correct（）

A. If estimated value ＜ the market price, buy the stock : it's under priced.

B. If the expected rate of return ＞ the required rate, buy the stock; it's under priced.

C. If the expected rate of return ＜ the required rate, don't buy the stock; it's under priced.