Answer: The correct answer is B.
Step-by-step explanation:
The correct answer is B. Platform as a Service (PaaS) includes the hardware infrastructure, operating system, runtime environment, and a DBMS if desired. PaaS is a cloud computing model in which a third-party provider delivers hardware and software tools, including an operating system, a database, and a web server, to users over the internet. PaaS also offers users the ability to develop and deploy their own applications and services. With PaaS, users are not responsible for managing any of the underlying infrastructure, such as servers, storage, or networking.