Final answer:
The correct term for a customer having roadside service through a membership like AAA is 'covered'. This indicates that they have an active agreement ensuring assistance in roadside emergencies.
Step-by-step explanation:
When a customer has coverage for a specific roadside service, they are typically referred to as b. Covered. This term implies that the customer has an active agreement with a service provider such as AAA; by paying membership dues, they are entitled to certain benefits, one of which is roadside assistance. Membership organizations like AAA provide material incentives, like roadside assistance, as a part of their membership package, ensuring help is available in the event of a vehicle breakdown or other road-related emergencies.