Implementing a hot site is the correct answer because a hot site is a fully equipped data center that is immediately available in the event of a disaster, with all the necessary hardware and software in place, making the switchover and restoration process much faster and more seamless than other options. Incremental backups, while helpful in restoring data, do not address the speed of the recovery process itself, primarily focusing on the recency of the data available. A cold site would require more time to become operational as it is not fully equipped, and up-to-date documentation, while important for recovery processes, does not directly reduce the recovery time of critical systems.