An investor owns a share of stock worth $ 75 and buys a put option for a premium of $ 2 with a strike price of $ 65. What are the risk and return characteristics of the portfolio The:（）

A. portfolio has unlimited downside risk, but the upside potential is limited to $ 65.

B. portfolio’s downside risk is a price of $73, but there is no maximum to the upside potential.

C. portfolio’s downside risk is a price of $ 63, but there is no maximum to the upside potential.

在《评标委员会和评标方法暂行规定》中，对评标委员会组成的要求包括( )。

A．评标委员会由5人以上的单数组成

B．评标委员会的成员必须是既懂经济又懂法律的专家

C．评标委员会的专家与所有投标人均没有利害关系

D．评标专家在相关领域工作满8年且具有高级职称或同等专业水平

E．评标委员会的成员能够认真、公正、廉洁地履行职责