Knowing that the sellers had a written exclusive right-to-sell listing with their listing broker that would expire on July 5, a broker from a different real estate firm contacted the sellers on April 20. At that time, this broker proposed that his firm list their property with the listing period to begin July 6. The broker had been contacted by someone who was arriving in the area on July 6 to look for housing. Was this broker in violation of the rules and regulations of the Missouri Real Estate Commission?

This choice misinterprets the situation. While the broker was aware of the existing listing, his proposed listing period begins after the current one expires, making his actions permissible under Missouri real estate regulations.

This option is incorrect because dual agency occurs when a single broker represents both the buyer and seller in a transaction simultaneously. Since the proposed listing would not start until after the exclusive listing expires, dual agency would not apply in this context.

While it is true that he could show the property after the expiration date, this choice does not directly address the legality of the broker's actions in proposing a new listing. The key issue is the timing of the proposed listing, which is valid as it begins after the current listing ends.