A company wants to isolate workloads by creating a separate AWS account for each workload. The company needs centralized management of networking components and account creation with automatic security controls (guardrails). Which solution provides these capabilities with the LEAST operational overhead?

The correct solution leverages AWS Control Tower for centralized account management and automatic security guardrails, directly addressing the company's requirements with minimal operational overhead. Control Tower automates the setup of a multi-account AWS environment. Creating a dedicated networking account and sharing subnets via AWS RAM allows for centralized network control and isolation, as workload accounts consume shared network resources without managing their own VPCs. Using AWS Organizations alone would require more manual configuration for security controls and account provisioning compared to Control Tower. Deploying a VPC in each workload account and routing through an inspection VPC with a transit gateway is a valid pattern but introduces more operational overhead for managing individual VPCs and transit gateway attachments across many accounts, especially for subnet sharing, which is simpler with RAM.