Given:
1. public class KungFu {
2.     public static void main(String[] args) {
3.         Integer x = 400;
4.         Integer y = x;
5.         x++;
6.         StringBuilder sb1 = new StringBuilder(“123”);
7.         StringBuilder sb2 = sb1;
8.         sb1.append(“5”);
9.         System.out.println((x == y) + ” ” + (sb1 == sb2));
10.     }
11. }
What is the result?
A.
true true
B.
false true
C.
true false
D.
false false
E.
Compilation fails.
F.
An exception is thrown at runtime.
B