The internal audit procedures manual provides detailed policies, methodologies, and processes to guide the internal audit function. This includes the quality assurance and improvement program (QAIP), which ensures engagement performance and overall conformance with the Standards.
Option A (charter) defines authority and purpose but is not part of procedures. Option B (annual plan) is a planning document, not methodology. Option C (engagement results) are outputs, not procedures.
Reference:
IIA Standards - Standard 2040: Policies and Procedures.