Final answer:
The correct answer is a). In fee-for-service medicine, healthcare providers are not completely autonomous, and the system is regulated to a certain extent.
Step-by-step explanation:
In the context of fee-for-service medicine, the correct answer is a) Regulated. Fee-for-service medicine refers to a payment model where healthcare providers are reimbursed for the specific services they provide. While healthcare providers do have some autonomy in making medical decisions, there are certain regulations and restrictions in place to ensure appropriate use of medical resources. For example, in order to visit the emergency room, a patient may need to get clearance or authorization depending on their condition.