An outside vendor is eligible for the guest role and the contractor role when accessing your network, that is secured with the Junos Pulse Access Control Service.What is the default role-mapping behavior?（）

• A、The vendor must select a role from a list of eligible roles.
• B、The vendor must select a rule from a list of eligible rules.
• C、The vendor is automatically mapped to the first configured role
• D、The vendor is automatically granted a merged role.