You are writing a page that contains an UpdatePanel for partial-page updates. You want that user should get the message “Processing is going on, please wait.” that the update is processing only if the update takes longer than 5 seconds. Which actions should you take?

• A. Add a ProgressBar control to the page. Set the Interval property to 5000. Set the text property as “Processing is going on, please wait.”
• B. Add a Timer control to the page. Set the Interval property to 5000. Set its text property to Processing is going on, please wait.”
• C. Add an UpdateProgress control to the UpdatePanel. Set its DisplayAfter property to 5000. Set its ProgressTemplate contents to read “Processing is go
• D. None of the above.