Assume the scoped attribute priority does NOT yet exist.<br /> Which two create and set a new request-scopedattribute priority to the value "medium"?()
A、
B、${requestScope[’priority’] = ’medium’}
C、<c:set var="priority" value="medium" />
D、<c:set var="priority" scope="request">medium</c:set>
E、<c:set var="priority" value="medium" scope="request" />