Answer: Backup and restore

The correct answer is C, Backup and restore. This is because it involves periodically backing up data and applications to a separate location or storage, and in the event of a disaster, restoring the backups to resume operations. This approach typically requires fewer resources and infrastructure compared to other options like warm standby, multisite, and pilot light, making it the least expensive disaster recovery option among the ones listed.

Author: LeetQuiz Editorial Team