Final answer:
The correct form of express written agency agreement authorizing a broker to find a buyer for a property is a listing agreement, which is option D.
Step-by-step explanation:
The common form of express written agency agreement between a seller and a broker, authorizing the broker to find a ready, willing, and able buyer for the property, is referred to as a listing agreement. This agreement establishes the terms and conditions under which the broker will operate, including the duration of the agreement, the broker's responsibilities, and the commission that the broker will earn upon the successful sale of the property.
In contrast, a lease agreement is used for renting property, a bill of sale is a document that transfers ownership of goods from one person to another, and a purchase agreement is a contract between a buyer and a seller detailing the terms of a property sale.
The correct answer to the question is therefore option D) Listing Agreement.