In addition to the operating system, what other components does the consumer manage in an IaaS cloud service model?

In addition to the operating system, what other components does the consumer manage in an IaaS cloud service model?
A . Application, data, storage, and physical networking
B . Data, middleware, application, and runtime
C . Runtime, physical servers, application, and middleware
D . Middleware, runtime, hypervisor, and application

Answer: B