Correct Answer: CTo address a defect revealed in a test session, the business analyst should determine if the defect is in the solution developed, in the original requirement, or in the test case. This step is crucial for identifying the root cause of the defect, which then informs the appropriate corrective action. If the defect lies in the solution, it may require a change request to amend the solution. If it originates from an error in the requirements, the requirements need revision. If the defect is due to an incorrect test case, the test case itself would need correction to ensure it accurately reflects the expectations and desired behavior of the solution.