Northern Trail Outfitters (NTO) wants to send out three emails In Automation Studio.

 To ensure that each emailis fully sent before the next begins, each Send Email activity should be added to different steps in the automation. This sequential approach ensures that the next email activity will not start until the previous one has completed. This method is supportedby Salesforce Marketing Cloud's documentation on building automations in Automation Studio, where the best practices for structuring sequential email sends are described.