Which method to manageD CO versions is limited to one version at the time?

VersionUI is limited to one version at a time because it's a manual interface designed for direct editing of a single DCO version. This method is best suited for minor adjustments or testing individual creative iterations. In contrast, using a Feed allows for managing multiple DCO versions simultaneously. A feed, typically a spreadsheet or XML file, can contain data for numerous creative variations, enabling bulk updates and more complex versioning strategies. Therefore, if you need to manage more than one DCO version concurrently, a feed-based approach is necessary.