What should be installed on a VM to assist with VM-to-host time synchronization?

What should be installed on a VM to assist with VM-to-host time synchronization?
A . VMware Tools
B . vRA guest agent
C . vROps agent
D . Guest Operations Manager

Answer: A

Explanation:

Reference: https://docs.vmware.com/en/VMware-vSphere/6.0/com.vmware.vsphere.vm_admin.doc/GUIDC0D8326A-B6E7-4E61-8470-6C173FDDF656.html