Explanation
Change-driven approaches to business analysis deal with rapid delivery of the business value. The business value is delivered in short iterations in return for acceptance of a higher degree of uncertainty regarding the overall delivery of the solution. The change-driven approaches are preferred while taking an exploratory approach for incremental improvement of an existing solution.
Answer D is incorrect. Iterative is not a valid business analysis approach.
Answer C is incorrect. The plan-driven approach defines business analysis activities. This approach is used to
focus on minimizing up-front uncertainty and to ensure that the solution is fully defined before implementation begins in order to maximize control and minimize risk. It is preferred when requirements are effectively defined in advance of implementation.
Answer A is incorrect. Progressive elaboration describes the project management approach of refining requirements and project scope, not the business analysis approach.

Explanation/Reference:
While every project manager wants to achieve customer satisfaction, this subjective term is too vague to be measured or accounted for.
What one person deems customer satisfaction may be low compared to another. Requirements need metrics to determine the level of success.
C is incorrect. The subjective requirements cannot be measured or mapped to quality
requirements.
B is incorrect. This is not an assumption, but a subjective requirement.
A is incorrect. This is not a risk, but a requirement that needs metric for measurement attached to
it.

Explanation
The class model is most often used with object-oriented development, while the entity-relationship diagram is preferred for relational databases.
Answer D is incorrect. WBS isn't a data model, but a decomposition of the project scope.
Answer B is incorrect. The project network diagram is an illustrated flow of project activities.
Answer C is incorrect. A data flow diagram shows how data moves into, through, and out of a system.