Which two demonstrate an “is a” relationship？（）   

A、 public interface Person { }  public class Employee extends Person { }

B、 public interface Shape { }  public class Employee extends Shape { }

C、 public interface Color { }  public class Employee extends Color { }

D、 public class Species { }  public class Animal （private Species species；）

E、 interface Component { }  Class Container implements Component （ Private Component[ ] children；  ）