Which two methods would allow them to utilize a Retention Policy?

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)
A . Clear data from the current data extension completely, then reconfigure a Retention Period via Email Studio.
B. Delete data from the data extension prior to twelve months ago, then configure a Retention Period via Contact Builder.
C. Reconfigure the current data extension as-is with a Retention Period via Contact Builder.
D. Replace the current data extension with a new data extension configured with a Retention Period.

Answer: B,C