A business analyst wishes to organise a requirements catalogue. He is aware of four kinds of requirements, those which:
(a) Describe the level of service required by the system.
(b) Are constraints placed on the system in terms of general rules of
operation.
(c) Refer to specific features to be delivered by the system.
(d) Are derived from software policies that reflect the company's IT
infrastructure.
Which of the following is the CORRECT allocation of categories of these four kinds of requirements?