A business practitioner is asked to generate an audience of customers with their latest subscription...

To maintain an updated audience with the latest subscription status, including new customers, the most effective approach would be to use a dynamic list that is updated daily. The term "Purge and Reuse" implies that the list will be cleared and repopulated with current data on a regular basis. This approach ensures that the audience list always reflects the most recent subscription statuses, including those of any new customers who have subscribed since the last update. A list of type "Group" would typically be used for static segmentations and wouldn't be as dynamic as a list of type "List".References:This answer is based on the standard practice of audience management in campaign systems where dynamic lists are used to reflect real-time or frequently updated data.