Which Army regulation governs the preparation and management of correspondence?

The preparation and management of correspondence in the Army is governed by Army Regulation 25-50. This regulation outlines the policies and procedures for the establishment of effective communication and ensures that the documents are properly formatted, controlled, and distributed. It provides detailed guidelines for writing correspondence, including memorandums, letters, and other forms of communication, which is vital for maintaining professionalism and clarity within the Army.

The rationale for this is that effective correspondence is essential for clear communication, maintaining proper documentation, and following prescribed procedures, thereby facilitating the smooth functioning of the Army’s operations. Proper correspondence management also helps to uphold the Army's standards of writing and professionalism, ensuring uniformity and coherence in communication across all levels and units.

The other options pertain to different aspects of Army operations; for example, AR 600-20 addresses command policy, AR 710-2 focuses on supply policy, and AR 735-5 deals with policies on property accountability. Each serves its specific purpose within the Army, but they do not govern correspondence, which is why they are not the correct answer in this case.