Click the Exhibit button. Given： 11.<% com.example.Advisor advisor = new com.example.Advisor（）； %> 12.<% request.setAttribute（"foo"， advisor）； %> Assuming there are no other "foo" attributes in the web application，which three are valid EL expressions forretrieving the advice property of advisor？（） A: ${foo.advice} B: ${request.foo.advice} C: ${requestScope.foo.advice} D: ${requestScope[foo[advice]]} E: ${requestScope["foo"]["advice"]}