How is an EPG extended outside of the ACI fabric? 

Answer options:

A. Create an external bridged network that is assigned to a leaf port.
B. Create an external routed network that is assigned to an EPG.C. Enable unicast routing within an EPG.D. Statically assign a VLAN ID to a leaf port in an EPG.

D

Reference: https://www.dclessons.com/l2-external-network-with-aci