Final answer:
The primary purpose of a CPA-issued management letter is to provide clients with recommendations for business improvements following an audit.Hence, the correct answer is option C.
Step-by-step explanation:
The primary purpose of a management letter, which CPAs often issue to clients after an audit engagement, is C) to provide the client with the CPA's recommendations for improving any part of the client's business. Although not required, this formal communication serves as a means for auditors to convey observations and suggestions that may aid in enhancing the company's operations, systems, and controls. It is useful for identifying small and large areas for improvement beyond the traditional scope of financial statement accuracy.