Answer:
c) PaaS
Explanation:
Refined and restrictive service model allows the user to use full package of application stack as demand by the service. It should be noted that "PaaS" is the most refined and restrictive service model.
Platform as a Service known as (PaaS ) is computing platform that gives room for the user in the cloud to manage applications.
PaaS helps to overcome the problem in managing the complexity of software licence. Example of PaaS are window Azure,Apache Stratos.
