现有：
1． class Wrench f
2.public static void main(String [] args) {
3.Wrench w=new Wrench(); Wrench w2=new Wrench();
4． w2=go (w, w2);
5.System.out.print (w2==w);
6． }
7.static Wrench go (Wrench wrl, Wrench wr2) {
8.Wrench wr3=wrl; wrl=wr2; wr2=wr3;
9． return wr3;
10． }
11． }
结果是什么？（）

A.false
B.true
C.编译失败
D.运行的时候有异常抛出