For the questions below, use the following partial class definitions: public class A1 {

public int x;

private int y;

protected int z;

... } public class A2 extends A1 {

protected int a;

private int b;

... } public class A3 extends A2 {

private int q;

... } Which of the following lists of instance data are accessible in class A2?

Select one:

A.

a, b

B.

x, y, z, a, b

C.

x, y, z, a

D.

z, a, b

E.

x, z, a, b