Correct Answer: BTo meet the requirements of the company, two key solutions are optimal: AWS CloudFormation and AWS Config. AWS CloudFormation enables the company to define and automate the provisioning of infrastructure as code, which helps in securing and consistently deploying the systems and network infrastructure. AWS Config, on the other hand, tracks and records all configuration changes to the infrastructure, thereby providing the ability to audit and monitor all incremental changes. Together, these services ensure that the infrastructure is both securely deployed and continuously monitored for changes, making this combination an ideal solution for the company's needs.