In the context of ACI Multi-Site, when is the information of an endpoint (MAC/IP) that belongs to site 1 advertised to site 2 using the EVPN control plane?

In the context of ACI Multi-Site, when is the information of an endpoint (MAC/IP) that belongs to site 1 advertised to site 2 using the EVPN control plane?
A . Endpoint information is not exchanged across sites unless COOP protocol is used.
B . Endpoint information is not exchanged across sites unless a policy is configured to allow communication across sites.
C . Endpoint information is exchanged across sites as soon as the endpoint is discovered in one site.
D . Endpoint information is exchanged across sites when the endpoints are discovered in both sites.

Answer: B

Explanation:

Reference: https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric-infrastructure/white-paper-c11-739609.html#CiscoACIMultiSiteoverlaydataplane