An administrator needs to deploy a new release of an application in a way that allows a quick rollback to the previous version of the application. Which of the following is the BEST strategy to apply?

Deploying in small batches (rolling deployment) can be slow for a full rollback, as each batch needs to be reverted sequentially, which is not as quick as an instantaneous switch.

Deploying to a subset (canary deployment) only allows quick rollback for that subset; reverting the entire application still requires more steps than an instant blue/green switch.

Deploying to a backup datacenter is primarily for disaster recovery or geographic redundancy, not the most direct or efficient method for rolling back a problematic application release within the primary production environment.

The best strategy for a quick rollback is a Blue/Green deployment. This involves deploying the new application release to an entirely separate, identical environment (the "green" environment) while the current production version (the "blue" environment) remains active. If issues are detected with the new release, traffic can be instantly switched back to the stable "blue" environment, ensuring minimal downtime for users.