下列程序运行结果是. interface InterfaceA{ String s="good "; void f（); } abstract class Cla

下列程序运行结果是. interface InterfaceA{ String s="good "; void f(); } abstract class ClassA{ abstract void g(); } class ClassB extends ClassA implements InterfaceA{ void g(){ System.out.print(s); } public void f(){ System.out.print(" "+s); } } public class E { public static void main(String[] args) { ClassA a=new ClassB(); InterfaceA b=new ClassB(); a.g(); b.f(); } }

A、编译正确，但无运行结果

B、编译错误：InterfaceA b=new ClassB();

C、good good

D、以上都不对

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