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>
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