Which description is correct for a private VLAN community port with respect to Layer 2 communications？（）   

• A、 It communicates with all other community ports in the private VLAN domain.
• B、 It communicates with only isolated ports in the private VLAN domain.
• C、 It communicates only with other community ports in the same community and associated promiscuous ports.
• D、 It communicates only with associated promiscuous and isolated ports.