下面哪个不对？

• A.RuntimeException is the superclass of those exceptions that can be thrown during the normal operation of the Java Virtual Machine.

• B.A method is not required to declare in its throws clause any subclasses of RuntimeExeption that might be thrown during the execution of the method but not caught

• C.An RuntimeException is a subclass of Throwable that indicates serious problems that a reasonable application should not try to catch.

• D.NullPointerException is one kind of RuntimeException