What is a business use case for integrating Marketing Cloud Personalization with Loyalty Management?

What is a business use case for integrating Marketing Cloud Personalization with Loyalty Management?
A . To enable the purchasing of products and take payment.
B. To create unified profile from multiple source of truth and build a golden record.
C. To be able to send personalized marketing emails in batches.
D. To offer promotions in real-time to customers.

Answer: D