Given：
11.public class MyServlet extends HttpServlet {
12.public void service（HttpServletRequest request，
13.HttpServletResponse response）
14.throws ServletException， IOException {
15.// insert code here
16.}
17.}
and this element in the web application’s deployment descriptor：
<error-page>
<error-code>302</error-code>
<location>/html/error.html</location>
</error-page>
Which，inserted at line 15，causes the container to redirect control to the error.html resource？（）

You want to create a valid directory structure for your Java EE web application， and your application usestag files and a JAR file.
Which three must be located directly in your WEB-INF directory（NOT in asubdirectory of WEB-INF）？（）