The correct answer is A. It acts as a measuring tool and progress indicator.

The primary benefit of periodic maturity model assessments is that they allow the organization to measure its current level of capability or maturity and compare progress over time. This helps management understand whether processes are improving, staying the same, or declining.

ISACA explains that COBIT performance management evaluates how well governance and management systems work and how they can be improved to achieve target levels of process and practice capability and maturity. ISACA also describes maturity models as methods based on measuring progress through predefined levels of increasing maturity.

Option B is not the best answer because a maturity assessment may identify weaknesses, but it does not automatically fix them. Option C is related, because maturity assessment results may support an improvement plan, but execution of the plan is not the primary benefit of the assessment itself. Option D is too broad; maturity assessments may support consistency and improvement, but their primary value is measurement and progress tracking.

This question maps mainly to Governance and Management of IT, because maturity assessment supports governance, performance monitoring, process improvement, and management oversight.