Final answer:
In Illinois, the agent who shows a property without any pre-arrangements regarding agency relationships is presumed to be the agent of the listing broker.
Step-by-step explanation:
In a typical multiple listing service arrangement in Illinois, the agent who shows a property without any pre-arrangements regarding agency relationships is presumed to be the agent of the listing broker. This means that the agent is working for the real estate company that listed the property for sale. The agent represents the interests of the listing broker in the transaction.