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 grants a buyer the exclusive right to purchase a property at a predetermined price within a specific timeframe, but it does not involve a licensee actively seeking a buyer for the seller. This type of contract is more about securing a future purchase option rather than facilitating a sale through representation.

A property management contract pertains to the management of rental properties and outlines the responsibilities of the manager in maintaining the property and handling tenant relations. It does not involve the sale of property, so it is not applicable in the context of finding a buyer for the apartment building.

A contract of sale is executed once a buyer and seller agree on the terms of a property transaction. However, it is not the agreement that initiates the process of finding a buyer; rather, it is the outcome of a successful marketing effort typically facilitated by a listing contract.