Which of the following is the most important system if a company wants to consolidate fan data from multiple sources, i. e., external, internal, current and historical.

A. data model
B. data warehouse
C. relational database fan management system
D. database management system

Data warehouse ( B )

Explanation:

In order to consolidate fan data from multiple sources a company needs a Data warehouse.  A data warehouse technological equipment  used to collect connect and analyze data from different sources linked to the company.

A data house helps businesses/companies to access and harmonize all relevant data that will help the business make meaningful business decision in the long and short run of the company. A data ware house uses the staging, data integration and access layers to house/perform its key functions.