Which of the HP Cloud Functional Reference Architecture interacts with the business layer?

A.
Supply

B.
Delivery

C.
Provision

D.
Demand

Explanation:
http://h30507.www3.hp.com/t5/Cloud-Source-Blog/Dissecting-Cloud-FunctionalReference-Architecture-Overview/ba-p/125407(See three layers of functionality – first bulleted point)