class A {  protected int method1（int a， int b） { return 0； }  }  Which two are valid in a class that extends class A？（） 

• A、 public int method1（int a， int b） { return 0； }
• B、 private int method1（int a， int b） { return 0； }
• C、 private int method1（int a， long b） { return 0； }
• D、 public short method1（int a， int b） { return 0： }
• E、 static protected int method1（int a， int b） { return 0； }