In a real estate transaction, what must a broker do if they receive an offer on a listed property?

When a broker receives an offer on a listed property, the primary responsibility is to contact the seller immediately. This is because the broker acts as the seller's agent, and it is essential to communicate any offers received to the seller without delay. Timely communication allows the seller to make informed decisions about whether to accept, decline, or counter the offer.

Promptly informing the seller also aligns with the broker's fiduciary duty to act in the best interest of their client, which includes keeping them informed of all developments regarding their property. This responsiveness can be crucial in a competitive market, as delaying communication might result in missed opportunities for the seller.

The other choices involve actions that either do not properly uphold the broker's obligations to the seller or may risk losing the chance to finalize a sale. Therefore, the correct approach is for the broker to immediately inform the seller of any offers received.