Which scenario may illustrate an illegal dual agency arrangement?

An illegal dual agency arrangement occurs when a broker represents both the buyer and the seller in the same transaction without obtaining informed consent from both parties. The first scenario illustrates this situation because Jackson appoints two salespersons from his brokerage to represent both the buyer and the seller. This setup can potentially create a conflict of interest, as one broker cannot fairly advocate for both sides without full transparency and consent from both parties involved.

In legal dual agency, full disclosure and consent are necessary to ensure that both parties understand and agree to the arrangement, thus mitigating any potential conflicts. In contrast, the other scenarios highlight situations where licensed individuals represent only one party at a time or reinforce consent for dual agency, which does not inherently imply illegality.