In the Context of ACI Multi-Site, When Is the Information

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.