Final answer:
A post-implementation review is conducted as a follow-up to a system's recent implementation to assess its performance and make any necessary adjustments.
Step-by-step explanation:
The correct answer is A. a post-implementation review. A post-implementation review is conducted after a system's recent implementation to assess its performance and ensure that it meets the desired objectives and requirements. This review allows for any necessary adjustments or improvements to be made to the system.