Final answer:
Marge being a real estate agent but not a realtor indicates that she is not a member of the National Association of REALTORS® (NAR). This status does not imply any limitations on her licensing or the type of properties she can handle.
Step-by-step explanation:
If Marge is a real estate agent, but she isn't a realtor, this means that she is not a member of the National Association of REALTORS® (NAR). Real estate agents are licensed professionals who facilitate the buying and selling of properties. However, not all real estate agents are realtors. A realtor is a trademarked term that refers to a real estate professional who is an active member of the NAR and adheres to its code of ethics. Therefore, the correct answer to the question is: Marge is not a member of the National Association of REALTORS® (NAR)