public class OuterClass&ens

public class OuterClass {  private double d1  1.0；  //insert code here   }   You need to insert an inner class declaration at line2. Which two inner class declarations are valid？（） 

• A static class InnerOne {  public double methoda（） {return d1；}  }
• B static class InnerOne {  static double methoda（） {return d1；} }
• C private class InnerOne {  public double methoda（） {return d1；} }
• D protected class InnerOne {  static double methoda（） {return d1；} }
• E public abstract class InnerOne {  public abstract double methoda（）；  }