How should they accomplish this task?

Northern Trail Outfitters is sending to an audience of over one million subscribers. They will use 10 different personalized fields in the email which reside in multiple data extensions. The goal is a timely email send from start to finish as it contains a limited quantity, first come-first served, special offer.

How should they accomplish this task?
A . Create and populate profile attributes for each of the 10 data extension fields and schedule a send with high priority.
B. Enable Send Throttling on high to ensure the speed Is increased to process the email as fast as possible.
C. Use the Lookup AMPscript function in the email to pull the fields from the data extensions for each subscriber.
D. Create and send to a sendable data extension containing those needed fields using a query activity.

Answer: C