You have an Azure subscription that contains a virtual machine named VM1.
You have an on-premises datacenter that contains a domain controller named DC1. ExpressRoute is used to connect the on-premises datacenter to Azure.
You need to use Connection Monitor to identify network latency between VM1 and DC1.
What should you install on DC1?

A. the Azure Connected Machine agent for Azure Arc-enabled servers B. the Azure Network Watcher Agent virtual machine extension C. the Log Analytics agent D. an Azure Monitor agent extension