What Makes Cisco DNA Center Different from Traditional Network Management

What makes Cisco DNA Center different from traditional network management applications and their management of networks?

A) Its modular design allows someone to implement different versions to meet the specific needs of an organization.
B) It only supports auto-discovery of network elements in a greenfield deployment.
C) It does not support high availability of management functions when operating in cluster mode.
D) It abstracts policy from the actual device configuration.