Final answer:
Deployment A involves the reliability pillar of the AWS Well-Architected Framework.
Step-by-step explanation:
Out of the four deployments mentioned, Deployment A is the one that involves the reliability pillar of the AWS Well-Architected Framework.
The reliability pillar focuses on ensuring that systems can recover from failures and can scale to meet demand. It includes components like fault tolerance, backup and restore mechanisms, and monitoring and recovery procedures.
Deployment A is likely to involve these reliability features, whereas Deployments B, C, and D may focus on other pillars of the framework such as performance, security, or cost optimization.