Which Statement About the SDN Framework Environment Is True

Which statement about the SDN framework environment is true?

A) The control plane function is split between an SDN controller and the networking element
B) The control plane and data plane are pulled from the networking element and put in an SDN controller and SDN agent
C) The data plane is controlled by a centralized SDN element
D) The control plane is pulled from the networking element and put in an SDN controller
E) The data is pulled from the networking element and put in an SDN controller