Which of the following activities would be improper for a listing broker to perform in the creation of a real estate transaction between a seller and a buyer?

This activity is a standard practice for listing brokers as it helps buyers make informed decisions. Sharing market information is essential for transparency and does not violate any ethical or legal guidelines, as it supports the buyer in understanding the market context of the property.

Disclosing material facts is not only appropriate but also a legal requirement for brokers. Listing brokers must inform buyers about any significant issues or features of the property to ensure that the buyer is fully aware and can make an informed decision, thereby upholding their fiduciary duty.

This activity is within the rights and responsibilities of a listing broker. They are expected to present all offers to the seller and negotiate terms that align with the seller's interests, which is a fundamental aspect of their role in the transaction process.