Which reason for this behavior is true?

When you add a VMM domain to an EPG in ACI, it seems that the host that is connected to the EPG-port group cannot communicate with its default gateway that configured on the EPG.

Which reason for this behavior is true?
A . The VLAN to which the EPG belongs is not configured on the uplink from the fabric interconnect to the Cisco UCS
B . The VLAN is blocked in the fabric interconnect.
C . A contract blocks the communication from the host to its default gateway
D . The configuration is not committed

Answer: A