现有: 1 . class Wrench2 { 2 . int size; 3. public static void main(String [] args) { 4. Wrench2 w=new Wrench2(); 5 . w.size=II; 6. Wrench2 w2=go(w, w.size); 7. System. out .print (w2. size); 8 . } 9. static Wrench2 go(Wrench2 wr. int s) { 10. S=12; 11. return wr; 12. } 13. } 结果为 ( )