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；  ）