Which two statements about the anti-defacement feature on FortiWeb are true?

Anti-defacement can redirect users to a backup web server, if it detects a change.

Anti-defacement downloads a copy of your website to RAM, in order to restore a clean image, if it detects defacement.

FortiWeb will only check to see if there are changes on the web server; it will not download the whole file each time.

Anti-defacement does not make a backup copy of your databases.