Which option, when applied to a rule, allows traffic to VPN gateways in specific VPN...

 The option that allows traffic to VPN gateways in specific VPN communities is Specific VPN Communities. This option lets you specify which VPN communities are allowed or denied by the rule. A VPN community is a group of VPN gateways or hosts that share the same VPN policy and keys. You can create different types of VPN communities, such as star, meshed, or remote access, depending on your network topology and security requirements. You can also use tags to group VPN gateways or hosts into logical categories.