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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.

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出自：Oracle认证

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