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

• A、${priority = ’medium’}
• B、${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" />