单项选择题

有如下程序:   #include   usingnamespacestd;   classBASE{   public:   ~BASE(){cout<<"BASE";}   };   classDERIVED:publicBASE{   public:   ~DERIVED(){cout<<"DERIVED";}   };   intmain(){DERIVEDx;return0;)   执行后的输出结果是(  )。

A.BASE
B.DERlVED
C.BASEDERIVED
D.DERlVEDBASE