Explanation
Requirements that do not add direct or indirect value need to be removed from the requirements set.
Answer B is incorrect. It's not best to justify the existence of requirements; requirements must contribute to
the business need or solution.
Answer A is incorrect. If the requirements do not add some type of value, then you don't need to determine
the purpose of the requirements. This answer isn't valid.
Answer C is incorrect. If the requirements were integrated or linked to other requirements, then it would
already be evident that the requirements offer an indirect value to the requirements, solution, or stakeholders.

Explanation
Functional decomposition converts the business goals into achievable objectives and measures.
Answer B is incorrect. Root cause analysis determines the underlying source of the problem.
Answer D is incorrect. Business rules analysis identifies changes in the policies that guide the organization
towards achieving its goals and objectives.
Answer A is incorrect. Understanding what competing organizations and peers are doing, Benchmarking
allows the organization to remain at a comparable level of service or identify opportunities to increase efficiency.

Explanation/Reference:
The project manager is responsible for writing the project scope. The solution scope serves as an input the project charter, which is needed for the project scope.
A is incorrect. The business analyst does not write the project scope.
D is incorrect. The sponsor doesn't write the project scope but she may approve the project
scope.
C is incorrect. The domain subject matter expert helps to identify the affected organizational units,
lines of business, and prioritization of the required capabilities defined in the solution scope.