What are two functionalities of northbound and southbound APIs within Cisco SDN architecture?

What are two functionalities of northbound and southbound APIs within Cisco SDN architecture?
(Choose two.)
A. Southbound APIs are used to define how SDN controllers integrate with applications.
B. Southbound interfaces utilize device configurations such as VLANs and IP addresses.
C. Northbound APIs utilize RESTful API methods such as GET, POST, and DELETE.
D. Southbound APIs utilize CLI, SNMP, and RESTCONF.
E. Northbound interfaces utilize OpenFlow and OpFlex to integrate with network devices.

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