Refer to the exhibit. When specifying subnets under a bridge domain for a given tenant, the user can specify the scope of a subnet. Which definition of the public subnet scope is true? 

Answer options:

A. It indicates that this subnet is advertised to the external router by the border leaf.
B. It indicates that this subnet is advertised to the border leaf in ACI fabric.
C. It indicates that it must be leaked to one or more private networks within ACI fabric.
D. It indicates that this subnet is advertised to public Internet and must be protected by a firewall.

A