A company plans to migrate many Windows virtual machines from its on-premises data center to AWS. They have validated a few sample workloads and have established an AWS Site-to-Site VPN to a VPC. Simple Network Management Protocol (SNMP) is enabled on each VM. They cannot add more VMs on-premises or install additional software on the existing VMs. Discovery must be imported automatically into AWS Migration Hub so a total cost of ownership (TCO) report can be generated for the entire migration. Which solution satisfies these constraints?

The correct answer is to launch a Windows EC2 instance, install the Migration Evaluator agentless collector, and configure Migration Evaluator to generate the TCO report. This solution directly addresses the constraints: the agentless collector gathers data without installing software on existing VMs, and Migration Evaluator is designed to produce TCO reports. The first incorrect option is wrong because AWS Application Migration Service (AWS MGN) is for migration execution, not TCO reporting, and its agentless offering is for specific virtualization platforms, not general discovery for TCO. The third incorrect option is wrong because Migration Hub itself does not generate TCO reports; Migration Evaluator is the correct service for this. The fourth incorrect option is wrong because the AWS Migration Readiness Assessment tool is for evaluating migration readiness, not for agentless discovery or TCO reporting.