Correct Answer: DDuring the test analysis and design stage, the most useful tools are the test management tool and the requirements management tool. The test management tool helps in organizing and tracking testing activities, test cases, and results, which are crucial during this stage. The requirements management tool assists in ensuring that all test cases are aligned with the requirements, making sure that the tests cover all necessary aspects of the software. These tools are essential in planning, designing, and preparing for the testing process.