When trying to configure a Virtual Port Channel (vPC), what might be a cause of the following error when trying to create the vPC domain?
Nexus-5548-B(config)# vpc domain 10
^% Invalid command at ‘^’ marker.Nexus-5548-B(config)#
A. Have not yet turned on the vpc feature using the ‘feature vpc’ command
B. The vPC links have to be configured before the vPC domain can be added
C. The vPC domain has already been configured
D. vPC domain cannot be configured at the global prompt