Final answer:
A listing broker is required to present all offers to the seller, and if Beverly filed a complaint against the broker for not doing so, the broker may have breached their ethical obligations and could face disciplinary action.
Step-by-step explanation:
The question relates to the conduct of a listing broker and the ethical obligations in real estate transactions. If Beverly, the buyer, filed a complaint against a listing broker for not presenting her offer to the seller, then the broker may have breached their duty. In real estate, a broker is typically required to present all offers to the seller unless instructed otherwise by the seller. Failing to do so could result in disciplinary action by the real estate commission and potentially lead to legal consequences, depending on the laws and regulations governing real estate in their jurisdiction.