A manager asks a network engineer to advise which cloud service models are used so employees do not have to waste their time installing, managing, and updating ...

A manager asks a network engineer to advise which cloud service models are used so employees do not have to waste their time installing, managing, and updating software that is only used occasionally. Which cloud service model does the engineer recommend?

A. infrastructure-as-a-service B. platform-as-a-service C. business process as service to support different types of service D. software-as-a-service