How should a Solution Architect classify the data warehouses as systems within the enterprise architecture of this scenario?

Universal Containers (UC) is starting to go through an inventory of capabilities in regard to its many data warehouses. UC’s data warehouses are currently being provided with data from OMS, ERP, Accounting, and other inventory management systems. Data warehouses are utilized by those systems for storage or analytics purposes.

UC plans to utilize the Systems of Engagement framework to classify its systems based on how they will be utilized within the enterprise architecture. UC would like to understand which systems it should directly integrate with versus utilizing the data warehouses where that data may also be stored.

How should a Solution Architect classify the data warehouses as systems within the enterprise architecture of this scenario?
A . System of Reference
B. System of Engagement
C. System of Intelligence
D. System of Record

Answer: D