You are designing an external binary large object (BLOB) store provider by implementing
the ISPExternalBinaryProvider interface. The farm has existing sites that contain content.
Your implementation has been verified to be working correctly. You need to ensure that
content within existing sites is moved using the external BLOB store provider. You also
must ensure that the solution does not require further custom coding. Which approach
should you recommend?

A.
Perform a backup and restore on each site.

B.
Perform a backup and restore of each content database.

C.
Perform a backup and restore on each site collection.

D.
Perform a backup and restore of the configuration database.