After a Catch Block Is Entered to Handle an Exception,which

After a Catch block is entered to handle an exception,which of the following statements are true?
I.A Catch block can rethrow an exception that it has not handled.
II.A Catch block can rethrow an exception that it has partially handled.
III.A rethrown exception may be handled by an exception handler list after that enclosing Try block.
IV.A Catch block cannot rethrow an exception that it has completely handled.

A) All of the above
B) II,III,and IV
C) I,II,and III
D) both I and II