Consider the following code. What is the size of the Hashset if the class Document does not override the equals(..) and hashcode() methods? HashSet set = new HashSet( ) ; set . add (new Document ( "Policy") ) ; set . add ( new Document ( "Insurance") ) ; set . add ( new Document ( "Policy") ) ; int size = set. size( ) ; 0 2 O 1 O 0 3