What was one of the errors made by Salesperson B in the transaction for the property?

Salesperson B made an error by incorrectly utilizing the "Agent of Buyer and Seller" designation. This designation implies that the agent represents both parties in the transaction, which requires full disclosure and impartiality. When this designation is used improperly, it can lead to conflicts of interest and potential breaches of fiduciary duty. An agent must ensure that all parties involved are aware of this dual agency and the potential implications it carries, such as how information is shared and the importance of maintaining confidentiality for both sides.

This choice highlights the necessity for agents to have a clear understanding of their roles and responsibilities, especially in complex transactions where dual agency is involved. Misusing this designation can lead to misunderstandings and legal complications, making it crucial for agents to use it accurately and appropriately.

With regard to the other options, while they may present relevant issues, the specific nature of the error involving the designation emphasizes the ethical responsibilities and obligations that agents hold in representing clients.