Final answer:
Real estate advertising must include the company name or principal broker's name as required by license laws for accountability and consumer contact purposes.
Step-by-step explanation:
Under real estate license laws, real estate advertising must contain specific information to ensure transparency and adherence to regulatory standards. The correct answer to your question is D) Company name or principal broker's name. This requirement ensures that the advertising is clearly associated with a licensed real estate entity, providing accountability and a point of contact for consumers.
While the inclusion of the company's address, listing agent's name, and company's telephone number might be common practice and can be beneficial for contact purposes, it is the company name or principal broker's name that is legally required in most jurisdictions. Laws and regulations may vary by state, so it is recommended to check the specific requirements in your area.