Duplicate copies of the data base are stored at all locations under: A. partitioning B. polling C. replication D. data sharing E. None of the above

The correct answer is C. Replication.

Replication is the process of copying data from one database to another. This can be done for a variety of reasons, such as to improve performance, to provide redundancy, or to make data available in multiple locations.

Partitioning is the process of dividing a database into multiple parts. This can be done for a variety of reasons, such as to improve performance, to reduce the size of the database, or to make it easier to manage.

Polling is the process of periodically checking a database for changes. This can be done for a variety of reasons, such as to monitor the database for errors, to update data in real time, or to provide a consistent view of the data.

Data sharing is the process of allowing multiple users to access the same data. This can be done for a variety of reasons, such as to improve collaboration, to reduce the amount of data duplication, or to make data available to users in different locations.

In conclusion, the correct answer is C. Replication.