Answer:
The right option is A that is HMO
Step-by-step explanation:
HMO is the term which stated as the Health Maintenance Organization, which is a kind or type of the plan that offers a wider range of the services of health cares via or through a network of providers who agreed in order to supply the services to the members.
So, HMO is the kind of insurance plan where all tests and the specialist visit need to be approved by the doctor.