You deploy multiple Mailbox servers.  Each Mailbox server contains a copy of a mailbox database named DB1.  You need to recommend a solution that allows administrators to remove corrupt messages that have beenreplicated before the corrupt messages are applied to each copy of DB1. What should you recommend？（）

• A、Modify log truncation.
• B、Enable circular logging.
• C、Implement lagged copies.
• D、Configure shadow redundancy.