Answer: c. ​a managed care approach.
Explanation:
Managed care approach is a professional health care that provide quality treatment, controls the cost of expenses on treatment like medicines, devices and other services. It also provides the network management and quality assurance in terms of treatment.
According to the given situation, Maria is likely to include a managed care approach for her service. She must managed the services by gaining access of the clients and monitoring the services they are getting.