【C012029】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)