How can Universal Containers achieve the requirement?

Universal containers ships millions of orders per year and releases code fixes to the production org mightily. Their corporate testing strategy requires that tests must be performed against Production data in an isolated test environment before code can be released to production.

How can Universal Containers achieve the requirement?
A . Use Salesforce-to- Salesforce to keep data synchronized between production and full sandboxes.
B . Utilize a middleware solution and batch API to do a nightly synch from production to Full sandbox.
C . Create APEX unit tests so testing can be done against Production data, but rolled back before being committed.
D . Request that Salesforce to schedule a full sandbox refresh on a nightly basis.

Answer: B