Which of the following items, included in the preliminary audit communication would be most useful...

In the preliminary audit communication, the condition is the most useful item for management to formulate action plans in response to audit recommendations. The condition describes the existing state or issue identified during the audit. It provides a clear and specific description of what is wrong or what needs improvement, which is essential for management to understand the problem and take appropriate corrective actions. While audit objectives, scope, and observation ratings are important, the condition directly points to the area that needs attention and improvement.

The Institute of Internal Auditors (IIA) Standard 2410 – Criteria for Communicating: "Communications must include the engagement’s objectives and scope as well as applicable conclusions, recommendations, and action plans."

IIA Practice Guide on "Communicating Audit Results"