A contract in which a licensee is employed by an owner to find a buyer for a 20-unit apartment building is most likely

An option contract is an agreement that gives a buyer the right, but not the obligation, to purchase a property at a specified price within a certain timeframe. This type of contract does not involve a licensee working to find a buyer, but rather provides a potential buyer with an exclusive opportunity to purchase the property.

A property management contract involves the hiring of a property manager to oversee the day-to-day operations of a property, including maintenance and tenant relations. This type of contract does not pertain to the sale of property and thus does not apply to the situation described.

A contract of sale is an agreement between a seller and a buyer detailing the terms of the purchase of a property. In this scenario, the licensee is not directly involved in creating a contract of sale; instead, they are tasked with finding a buyer, which is covered under a listing contract.