You administer nine virtual file servers on a single Hyper-V physical host that contains two 8-core processors. Currently, each server is running Windows Server 2012 Standard edition on one host. You are thinking of migrating these servers to Windows Server 2016. Over a three-day period, you discover the following load for the virtual file servers: Avg Proc 95% CPU utilization Server 1 25 5% Server 2 25 3% Server 3 35 6% Server 4 15 5% Server 5 15 3% Server 6 10 6% Server 7 25 5% Server 8 20 3% Server 9 30 6% Which type of license should be purchased? Why purchase this license if you upgrade these servers to Windows Server 2016?