Explanation:

According to the recommended procedures for compliance with Standard IV (C) (Responsibilities of Supervisors), a firm's stand-alone code of ethics should be written in plain language to ensure clarity and understanding. It should also address general fiduciary concepts.

• Option A is correct because it aligns with the requirement for plain language in the code of ethics.
• Option B is incorrect because integrating the code of ethics solely into compliance procedures undermines the goal of reinforcing ethical obligations.
• Option C is incorrect because while plain language is required, the integration into compliance procedures is not a recommended practice under this Standard.