有以下程序 #include ＜iostream＞ #include ＜string＞ using namespace std; class base { private: char baseName[10]; public: base () {strcpy(baseName,"Base"); } virtual char *myName() {return baseName; } char *className() {return baseName; } }; class Derived : public base { private: char derivedName[10]; public: Derived() {strcpy(derivedName,"Derived"); } char *myName() {return derivedName; } char *className() {return derivedName; } }; void showPtr(base &p) { cout＜＜p.myName () ＜＜" "＜＜p.className (); } int main () { base bb; Derived dd; showPtr(dd); return 0; } 运行后的输出结果为

A．Derived Base

B．Base Base

C．Derived Derived

D．Base Derived

商业银行经营与管理三大原则的首要原则是（）

A．安全性原则

B．盈利性原则

C．流动性原则

D．效益性原则