A.<jsp:useBeanid="student" class="Student" scope="session"></jsp:useBean>?xml:namespace>

B.<jsp:useBeanid="student" class="Student" scope="session">hello student!</jsp:useBean>

C.<jsp:useBeanid="student" class="bean.Student" scope="session">hello student!</jsp:useBean>

D.<jsp:getProperty name="name" property="student"/>?xml:namespace>