Which auxiliary component, with a default configuration, has the ability to self-update after an upg

Which auxiliary component, with a default configuration, has the ability to self-update after an upgrade?

A. Workspace ONE Access Connector
B. Unified Access Gateway

C. Secure Email Gateway on UAG

D. AirWatch Cloud Connector

Reference: https://docs.vmware.com/en/VMware-Workspace-ONE-UEM/1903/WS1_Upgrade.pdf