Given:

Which exception or error will be thrown when a programmer attempts to run this code?（）

A.end
B.Compilation fails.
C.exception end
D.exception test end
E.A Throwable is thrown by main.
F.An Exception is thrown by main.

A.2
B.3
C.12
D.23
E.123
F.Compilation fails.
G.An exception is thrown at runtime.

A.null
B.zero
C.some
D.Compilation fails.
E.An exception is thrown at runtime.