A. A plan that focuses on furthering the independence of the internal audit activity:While independence is essential, it is not directly related to professional development planning, which addresses skill enhancement.

B. A plan that ensures internal auditors collectively possess expertise in various fields to avoid outsourcing:This may be a benefit of professional development but is not its primary objective.

C. A plan based on individual preferences and proposals, which helps internal auditors achieve greater success:This option emphasizes individual goals rather than aligning professional development with organizational needs.

D. A plan that focuses on filling gaps in the current skills needed to complete audit objectives:Correct. Professional development should address skill gaps to enhance the internal audit activity’s ability to meet its objectives effectively.

CIA Exam Syllabus Reference:

Domain IV: Managing the Internal Audit Function – Professional Development and Resource Management.