根据下面的程序代码，哪些选项的值返回true？public class Square {      long width;      public Square(long l) {           width = l;      }      public static void main(String arg[]) {           Square a, b, c;           a = new Square(42L);           b = new Square(42L);           c = b;           long s = 42L;      } }

• A.a == b

• B.s == a

• C.b == c

• D.a.equals(s)