Given：
11.String test = "Test A. Test B. Test C."；
12.// insert code here
13.String[] result = test.split（regex）；
Which regular expression， inserted at line 12，correctly splits test into "Test A"，"Test B"，and "Test C"？（）

A.password：got
B.password：got aiko
C.password：aikogot aiko
D.An exception is thrown at runtime.
E.Compilation fails due to an error on line 8.

A.Compilation fails.
B.An exception is thrown at runtime.
C.An instance of Forest is serialized.
D.An instance of Forest and an instance of Tree are both serialized.

A.7
B.49
C.343
D.Compilation fails.
E.An exception is thrown at runtime.