Given: 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(); }