What is a characteristic of a stretched bridge domain solution between Cisco ACI sites with Layer 2 flood disabled?

What is a characteristic of a stretched bridge domain solution between Cisco ACI sites with Layer 2 flood disabled?
A. The application profile that is associated to the bridge domain have local significance in each site.
B. The tenant and VRF that associated to the bridge domain have local significance in each site.
C. Headend replication is used for BUM traffic between sites.
D. IP mobility is ensured between sites for disaster recovery.