A company hosts dozens of multi-tier applications on AWS. The presentation layer and logic layer are Amazon EC2 Linux instances that use Amazon EBS volumes. The company needs a solution to ensure that operating system vulnerabilities are not introduced to the EC2 instances when the company deploys new features. The company uses custom AMIs to deploy EC2 instances in an Auto Scaling group. The solution must scale to handle all applications that the company hosts. Which solution will meet these requirements?