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；  ）