What should you do?

You have the Azure virtual machines shown in the following table.

A DNS service is installed on VM1.
You configure the DNS servers’ settings for each virtual network as shown in the following exhibit.

You need to ensure that all the virtual machines can resolve DNS names by using the DNS service on VM1.
What should you do?
A. Add service endpoints on VNET2 and VNET3
B. Add service endpoints on VNET1
C. Configure a conditional forwarder on VM1
D. Configure peering between VNET1, VNET2, and VNET3