Which port-channel type is the best when deploying a Cisco Nexus 1000V with Cisco UCS B-Series Blades?

Which port-channel type is the best when deploying a Cisco Nexus 1000V with Cisco UCS B-Series Blades?
A. channel-group mode on sub-group cdp
B. channel-group auto mode on mac-pinning
C. channel-group auto mode active
D. channel-group mode on mac-pinning