Final answer:
The National Association of REALTORS Code of Ethics was adopted in 1913, setting ethical guidelines for real estate professionals.
Step-by-step explanation:
The National Association of REALTORS Code of Ethics was first adopted in the year 1913. This code of ethics was established to ensure that all real estate professionals adhere to a strict set of ethical guidelines and standards of practice, fostering trust and integrity in the industry. It has since become a foundational document that guides the professional conduct of real estate practitioners