已知接口 IHello 和类 Base、MyClass 的定义如下: interface IHello { void Hello(); } class Base : IHello { public void Hello() { Console.WriteLine("Hello in Base!"); } } class Derived : Base { public void Hello() {
A、Hello in Base!
B、Hello in Derived!
C、Hello in Base!Hello in Derived!
D、Hello in Derived!Hello in Base!.