Final answer:
A transaction broker's duty is to fill out a lease form with a prospective tenant, providing neutral assistance in a real estate transaction without representing either party exclusively.
Step-by-step explanation:
The duty associated with a transaction broker is Filling out a lease form with a prospective tenant. A transaction broker is a real estate professional who facilitates a real estate transaction without having a fiduciary relationship (such as representing exclusively the seller or the buyer) with the parties involved. Common responsibilities of a transaction broker include assisting both parties with paperwork, providing administrative support, and offering advice and information in a neutral capacity.
Options A, B, and C describe duties typically associated with an agent who represents a client in a fiduciary capacity (either a landlord, seller, or property owner), not the neutral role of a transaction broker.