Given:
11.<% java.util.Map map = new java.util.HashMap();
12.request.setAttribute("map", map);
13.map.put("a", "b");
14.map.put("b", "c");
15.map.put("c", "d"); %>
16.<%-- insert code here --%>
Which three EL expressions, inserted at line 16, are valid and evaluate to "d"?()