A listing broker presents his client with a full-price offer from a ready, willing, and able buyer. The seller refuses the offer and tells the broker it's because the buyer is black. The buyer makes an offer on another property. Which of these steps could the broker takea. Explaining to the seller that she is in violation of the Fair Housing Actb. Suing the seller for his full commissionc. Informing the buyer of his right to file a complaint with HUDd. All of the above