Northern Trail Outfitters (NTO) has been storing web behavior to a data extension for several years. They have indicated with several hundred millions of rows there has been an impact on performance. NTO indicates they only need to store data from the previous twelve months which will not exceed eighty million rows.
Which two methods would allow them to utilize a Retention Policy? (Choose 2 answers)

During discovery, the customer outlines data requirements and the anticipated use of Marketing Cloud with the following criteria:
* Customer data will be fully refreshed every night via Import activity from the customer's data warehouse.
* Contact records will be augmented by relational data tables via Contact Builder.
* The customer data file will contain 5M records with 40+ attributes.
* One attribute will house HTML code, 1000 characters max, that will be used to populate Account Access content areas in emails.
* A customer ID will be used as the unique identifier for each contact.
Which statement differentiates the use of data extensions over lists?

Northern Trail Outfitters has created child business units (BU) for their different regional offices. They want to limit subscriber records by BU, so users who are assigned to a BU can only view and send to Subscriber records in their region. A Profile Attribute named 'Region' associates a subscriber to a geographical region.
How could they ensure subscribers with a matching 'Region' Profile Attribute value are available in each BU?

Every day at 3 a.m., Northern Trail Outfitter' (NTO) data lake instance starts generating a file that contains all records that should be sent one email or another for the next day's marketing campaigns. The size of the file varies depending on the previous day's tracking activity. As soon as the file is generated, NTO wants to import the data, segment the data, and then execute the daily sends.
What end-to-end process should deliver this efficiently?

Northern Trails Outfitters has a contact count of nearly 10 million records. They have noticed slower processing times when sending using Journey Builder.
Which two actions could they take to optimize Journey performance? (Choose 2 answers)