Choice D is correct.

Successful software architecture deals with addressing the non-functional service level requirements of a system. The Design process takes all the functional business requirements into account. Security is considered a non-functional requirement and specific business rules, such as the one described with the checking account are considered functional requirements. D is the only choice that accurately describes this.

Choice A is incorrect because the functional and non-functional requirements are flipped over.

Choice B is incorrect because only one of them is a functional requirement.

Choice C is incorrect because as described above, one of them is a functional requirement and the other, a non-functional requirement.

Finally Choice E is incorrect because business analysis may start with use cases (where the checking account rules may be captured), but this discussion is specifically questioning functional vs. non-functional requirements.

Continue quiz>