Consider the following method definition:

int update( int userIn )
{
   userIn++;
   return userIn;
}
Which of the following client calls will always result in the variable clientVal being incremented by exactly 1?

	A.	
   clientVal = update( y );
	B.	
   y = update( clientVal  );
	C.	
   clientVal = update( clientVal  );
	D.	
   update( clientVal  );