How should consumers, retailers, and wholesale buyers be defined in Data Designer?

Northern Trail Outfitters (NTO) uses Marketing Cloud to connect with its individual consumers, retailers and wholesale buyers, and its corporate apparel customers. Marketing Cloud is currently configured with data extensions containing Store, Order, Product, and Contact information. NTO is in the process of implementing Data Designer and linking its data extensions.

How should consumers, retailers, and wholesale buyers be defined in Data Designer?
A . One-to-Many Relationship
B. Many-to-Many Relationship
C. One-to-One Relationship
D. Population

Answer: C