Which statement is true about Software Defined Network (SDN)?

A.
SDN are security standards that increase environment performance.

B.
SDN provides a breakdown, by time, of the quantity and distribution of the unbind transactions found within
the audit log.

C.
SDN disables group conflict resolution if the environment is configured for replication.

D.
SDN decouples the network control and forwarding layer functions.

Explanation:
https://en.wikipedia.org/wiki/Software-defined_networking