Which arguments justify the need for documenting requirements systematically?

The justification for documenting requirements systematically emphasizes the need for thoroughness and clarity throughout the project lifecycle. The rationale behind the correct choice focuses on the relationship between documented requirements and the testing process.

When requirements are clearly documented, it becomes significantly easier to derive test cases from those documented requirements. Systematic documentation allows for a comprehensive mapping between requirements and their corresponding test cases, ensuring complete test coverage. If requirements are not documented, it creates ambiguity and potential gaps in understanding, making it impossible to verify if all functional and non-functional requirements are effectively covered by tests. As a result, systematic documentation serves as a foundational reference point to check whether all aspects of what is being built have been accounted for in the tests.

While other points may touch on important aspects of requirement management, the ability to check coverage by test cases is a critical factor that highlights the importance of systematic documentation in ensuring the overall quality and reliability of the finished product.