how would you describe data warehousing to the customer?

If a customer is planning on building a data warehouse, how would you describe data
warehousing to the customer?

A.
Data warehouses can only be based on multidimensional data modeling.

B.
Application based data warehouses can be bought off the shelf and used without any

tweaking.

C.
Data warehouse projects are usually implemented within two weeks.

D.
The data in the data warehouse describes events and statuses of business processes,
products and services, goals and organizational units, and generally mirrors every aspect of
the structure and behavior of the organization.