Dedicated Hosts is the correct choice because it provides a physical server dedicated to your account and exposes the socket and core counts you need to align per core or per socket licensing and to satisfy vendor audit and bring your own license requirements.

With Dedicated Hosts you get host level visibility and control that lets you map licenses to physical cores and track allocations for audits. This option supports BYOL scenarios because the underlying hardware is not shared with other customers and you can view and manage the instance placement on specific hosts.

On-Demand Instances are a pay as you go pricing option and they do not grant host level control or visibility into physical sockets and cores so they cannot meet per core licensing and audit needs.

Reserved Instances provide a discounted pricing commitment for capacity over a term and they do not change tenancy or reveal physical host details that are required for per core or per socket license compliance.

Spot Instances use spare capacity and can be interrupted and they also do not provide dedicated hardware or host level metrics needed for vendor audits or BYOL per core licensing.

Full AWS Practitioner Certification Question