Which of the following is the GREATEST risk when implementing a data warehouse?

A.
increased response time on the production systems

B.
Access controls that are not adequate to prevent data modification

C.
Data duplication

D.
Data that is not updated or current

Explanation:
Once the data is in a warehouse, no modifications should be made to it and access controls should be in place to prevent data modification. Increased response time on the production systems is not a risk, because a data warehouse does not impact production datA . Based on data replication, data duplication is inherent in a data warehouse. Transformation of data from operational systems to a data warehouse is done at predefined intervals, and as such, data may not be current.