A network administrator of a global organization is collapsing all controllers to a single cluster located in central Europe. Which concern must be addressed? 

Answer options:

A. Some channels may not be available consistently across the organization.
B. Different RF policies per office are not available in this configuration.
C. Syslog must be configured to the time-zone of the NMS platform.
D. Centralized controllers cannot uniformly authenticate global users.

C