—It often rains in that area.Please take an umbrella with you.

—________.

A．Well, it just depends

B．All right，you're welcome

C．Yes, take it with me

D．OK，just in case

下列不是描述类的成员函数的是

A．构造函数

B．析构函数

C．友元函数

D．拷贝构造函数