A company runs an application with an Amazon EC2 and on-premises configuration. A DevOps Engineer needs to standardize patching across both environments. Company policy dictates that patching only happens during non-business hours.
Which combination of actions will meet these requirements? (Choose three.)
A . Add the physical machines into AWS Systems Manager using Systems Manager Hybrid Activations.
B . Attach an IAM role to the EC2 instances, allowing them to be managed by AWS Systems Manager.
C . Create IAM access keys for the on-premises machines to interact with AWS Systems Manager.
D . Execute an AWS Systems Manager Automation document to patch the systems every hour.
E . Use Amazon CloudWatch Events scheduled events to schedule a patch window.
F . Use AWS Systems Manager Maintenance Windows to schedule a patch window.
Answer: CDE
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