What is a requirement when authenticating a RESTCONF API session with a router that runs Cisco IOS XE Software?

What is a requirement when authenticating a RESTCONF API session with a router that runs Cisco IOS XE Software?

A. No authentication is required. B. OAuth must be used. C. A token must be retrieved and the associated string must be embedded in the X-Auth-Token header. D. Basic authentication must be used.