According to the BABOK Guide, validating performance measures and alignment with KPIs is a technique for evaluating solution performance. This technique can help the BA determine whether the system is performing as intended and address the concerns of the CEO, as it provides evidence of how well the system meets the expected outcomes and benefits3. By comparing the performance measures with the key performance indicators (KPIs), the BA can assess if the system is delivering value to stakeholders and meeting their needs and expectations. Therefore, the correct answer is D. References: BABOK Guide, [CCBA Mock Test]