10. public class SuperCaic {  11. protected static int multiply（int a， int b） { return a * b； }  12. }  and：  20. public class SubCalc extends SuperCalc {  21. public static int multiply（int a， int b） {  22. int c = super.multiply（a， b）；  23. return c；  24. }  25. }  and：  30. SubCalc sc = new SubCalc（）；  31. System.out.println（sc.multiply（3，4））；  32. System.out.println（SubCalc.multiply（2，2））；  What is the result？（）

• A、 12 4
• B、 The code runs with no output.
• C、 An exception is thrown at runtime.
• D、 Compilation fails because of an error in line 21.
• E、 Compilation fails because of an error in line 22.
• F、 Compilation fails because of an error in line 31.