多选题1. public class OuterClass {  2. private double d1 = 1.0；  3. // insert code here  4. }  Which two are valid if inserted at line 3？（）Astatic class InnerOne { public double methoda（） { return d1； } }Bstatic class InnerOne { static double methoda（） { ret

static class InnerOne { public double methoda（） { return d1； } }

static class InnerOne { static double methoda（） { return d1； } }

private class InnerOne { public double methoda（） { return d1； } }

protected class InnerOne { static double methoda（） { return d1； } }

public abstract class InnerOne { public abstract double methoda（）； }