A cloud computing vendor is focusing on delivering applications to customers. The goal is to simplify the
deployment of database functionality while removing the need for customers to manage the operation system
and application patching. Which of the following types of solution is the vendor offering?

A.
IT as a Service

B.
Infrastructure as a Service

C.
Anything as a Service

D.
Platform as a Service

E.
Software as a Service

Explanation:
PaaS includes infrastructure — servers, storage, and networking — but also middleware, development tools,
business intelligence (BI) services, database management systems, and more.
Note:

https://azure.microsoft.com/en-us/overview/what-is-paas/