Final answer:
Ms. Adams' most unlikely action would be to walk away from the transaction after a deposit refund attempt by the seller, since the property's value will increase due to a highway rerouting.
Step-by-step explanation:
Ms. Adams' most unlikely course of action after being returned the deposit for the property due to the seller finding out about the highway rerouting would be to simply walk away from the transaction. Given that the value of the property is going to be enhanced, it would not be in her best interest financially to abandon the purchase. Instead, her likely actions might include insisting on the completion of the purchase under the original terms, seeking legal remedies to enforce the contract, or renegotiating the terms with the seller to reflect the new value of the property.
Ms. Adams's most unlikely course of action would be to refuse the return of the deposit. As the seller, she requested the broker to return the deposit to the buyer due to the potential increase in property value. However, if Ms. Adams refuses to accept the return of the deposit, she would be preventing the buyer from receiving their money back. This action would be unlikely as it goes against her initial instruction and could potentially lead to legal issues.