Salesforce Exam Marketing Cloud Administrator Topic 2 Question 40 Discussion

Northern Trail Outfitters (NTO) Is building a Journey which randomly sends five different versions of an initial welcome email to new subscribers; however, subscribers receive the same follow-up email two weeks later. To improve maintainability of their email content, NTO wants to use five completely different emails, rather than having one email with dynamic content.

Which activity would allow them to build the journey with the fewest activities possible?