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单项选择题

Click the Exhibit button. Given this code from Class B:……

Click the Exhibit button.  
Given this code from Class B:  
25. A a1 = new A();  
26. A a2 = new A();  
27. A a3 = new A();  
28. System.out.println(A.getInstanceCount()); 
 What is the result?()



A. Compilation of class A fails.
B. Line 28 prints the value 3 to System.out.
C. Line 28 prints the value 1 to System.out.
D. Compilation fails because of an error on line 28.
E. A runtime error occurs when line 25 executes.