During a high traffic portion of the day, one of your relational databases crashes, but the replica is never promoted to a master. You want to avoid this in the...

During a high traffic portion of the day, one of your relational databases crashes, but the replica is never promoted to a master. You want to avoid this in the future.
What should you do?

A. Use a different database B. Choose larger instances for your database C. Create snapshots of your database more regularly D. Implement routinely scheduled failovers of your databases