A CSA Needs to Apply New OS Security Patches to the Application

Multiple Choice

A CSA needs to apply new OS security patches to the application cluster server farm in a public cloud provider. The CSA wants to ensure the security patch and configuration are consistent for all members of the server farm. Which of the following deployment practices is the BEST approach to do this?

A) Update and validate the runbook procedures prior to the patch rollout.
B) Leverage the infrastructure as code and replace each server farm member.
C) Configure and patch each server individually and take an OS differential backup.
D) Snapshot all existing server farm members before installing the patch.