Assume the scoped attribute priority does NOT yet exist. Which two create and set a new request-scopedattribute priority to the value "medium"？（）

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" />