HOTSPOT
Your network contains an Active Directory domain named contoso.com. The domain
contains a member server named Hyperv1 and a domain controller named DC1.Hyperv1
has the Hyper-V server role installed. DC1 is a virtual machine on Hyperv1.
Users report that the time on their client computer is incorrect.
You log on to DC1 and verify that the time services are configured correctly.
You need to prevent time conflicts between the time provided by DC1 and other potential
time sources.
What should you configure?
To answer, select the appropriate object in the answer area.
Answer: 
Explanation:
Hyper-V integration services are updated with a new service that allows Hyper-V
administrators to copy files to the virtual machine while the virtual machine is running without
using a network connection.
In previous versions of Hyper-V, a Hyper-V administrator may have needed to shut down a
virtual machine to copy files to it.A new Hyper-V integration service has been added that
allows the Hyper-V administrator to copy files to a running virtual machine without using a
network connection. This will eliminate time conflicts.
References:
http://technet.microsoft.com/en-us/library/dn282278.aspx
Answer is correct. For virtual machines that are configured as domain controllers, it is recommended that you disable time synchronization between the host system and guest operating system acting as a domain controller. This enables your guest domain controller to synchronize time from the domain hierarchy.
To disable the Hyper-V time synchronization provider, shut down the VM and clear the Time synchronization check box under Integration Services.
https://technet.microsoft.com/en-us/library/virtual_active_directory_domain_controller_virtualization_hyperv%28v=ws.10%29.aspx