Which method will dynamically register tags on the Palo Alto Networks NGFW?

Which method will dynamically register tags on the Palo Alto Networks NGFW?
A . Restful API or the VMWare API on the firewall or on the User-ID agent or the read-only domain controller (RODC)
B . Restful API or the VMware API on the firewall or on the User-ID agent
C . XML-API or the VMware API on the firewall or on the User-ID agent or the CLI
D . XML API or the VM Monitoring agent on the NGFW or on the User-ID agent

Answer: D

Explanation:

Reference: https://www.paloaltonetworks.com/documentation/80/pan-os/pan-os/policy/register-

ip-addresses-and-tags-dynamically