单项选择题 Assume that a news tag library contains the tags lookup and item： lookup Retrieves the latest news headlines and executes the tag body once for each headline. Exposes a NESTED page scoped attributecalled headline of type com.example.Headline containing details for that headline. item Outputs the HTMLfor a single news headline. Accepts an attribute info of typecom.example.Headline containing details for theheadline to be rendered. Which snippet of JSP code returns the latest news headlines in an HTML table，one per row？（）

单项选择题 One of the use cases in your web application uses many session-scoped attributes. At the end of the usecase， you want to clear out this set of attributes from the session object. Assume that this static variableholds this set of attribute names： 201.private static final Set<String> USE_CASE_ATTRS；  202.static { 203.USE_CASE_ATTRS.add（"customerOID"）； 204.USE_CASE_ATTRS.add（"custMgrBean"）； 205.USE_CASE_ATTRS.add（"orderOID"）； 206.USE_CASE_ATTRS.add（"orderMgrBean"）； 207.} Which code snippet deletes these attributes from the session object？（）

单项选择题 Whichstatementistrueaboutwebcontainersessionmanagement？（）