A development team

released a new version of an application and wants to deploy it to the cloud environment with a faster rollback and minimal downtime. Which of the following should the cloud administrator do to achieve this goal?

A. Use a rolling deployment to update all

the servers in the PROD cloud environment with the new application. To switch to the previous version, repeat the process.

B. Deploy the application to the PROD cloud environment and the previous version to QA. To switch to the previous version, promote th

e QA environment to PROD.

C. Deploy the application to a subset of servers in the environment and route traffic to these servers. To switch to the previous version, change the route to the non-updated servers.

D. Deploy the application to a staging environ

ment and force a failover to this environment. To restore the previous version, create a backup and restore from the previous night-s backup.