What gets displayed on the screen when the following program is compiled and run. Select the one correct answer. protected class example { public static void main(String args[]) { String test = "abc"; test = test + test; System.out.println(test); } }
选项：

A:The class does not compile because the top level class cannot be protected;
B:The program prints "abc";
C:The program prints "abcabc";
D:The program does not compile because statement "test = test + test" is illegal