Which is NOT a property of an RSS 2.0 feed?
1) the root is an rss node with a version attribute whose value is "2.0"
2) there are one or more channel nodes as a child of the root
3) the channel node must have one of each of these nodes as children: title, link, and description
4) the channel node can also have zero or more item child nodes plus other optional children
5) e. all the above are true for RSS 2.0