11. public class Test { 
12. public void foo（） { 
13. assert false； 
14. assert false； 
15. } 
16. public void bar（）{ 
17. while（true）{ 
18. assert false； 
19. } 
20. assert false； 
21. } 
22. } 
What causes compilation to fail？（）  

interface Beta {} 
class Alpha implements Beta { 
String testIt（） { 
return “Tested”； 
} 
} 
public class Main1 { 
static Beta getIt（） { 
return new Alpha（）； 
} 
public static void main（ String[] args ） { 
Beta b = getIt（）； 
System.out.println（ b.testIt（） ）； 
} 
} 
What is the result？（）