To prevent retention of stagnant data, Northern Trail Outfitters (NTO) wants anyinactive data stored in...

 To clear inactive data stored in data extensions after 12 months, NTO should apply a row-based retention to each data extension as it is created, set to 12 months. This will delete any records that have not been modified in the last 12 months. Row-based retention can be applied to individual data extensions or data extension templates