Explanation
Creating folders in My Tracking and selecting where to send results when sending an email is the best way to help organize NTO's email tracking results. This way, NTO can group their email campaigns by different criteria, such as date, topic, audience, etc., and easily find the results they need. Giving emails unique names is also helpful, but it does not provide a way to categorize them. Removing old tracking results may declutter the results list, but it may also delete valuable information.

Explanation
Automation Studio and Journey Builder can be used to accommodate this request. Automation Studio can be used to create an automation that runs daily and injects new records from the data extension into a journey.
Journey Builder can be used to create a journey that sends a customized 'congratulations' email immediately after entry, and then waits for 14 days before sending a review request email. Journey Builder and Behavioral Triggers would not work because behavioral triggers are based on web or mobile app activity, not purchase data. Automation Studio and Path Optimizer would not work because path optimizer is used to test different paths within a journey, not different product recommendations.

Explanation
The Analytics Dashboard is a Journey Builder resource that provides data on all versions of a specific journey's cross-channel performance data. The Analytics Dashboard can show metrics such as audience size, goal attainment, message engagement, channel performance, etc. The Analytics Dashboard can also compare different versions of a journey and show trends over time.