Which of the following is unlawful for a dealer?

The correct choice indicates that all the given actions are unlawful for a dealer. Each action undermines the principles of transparency and fairness that are paramount in commercial transactions.

Entering into a listing agreement without specifying a termination date creates confusion and can potentially trap the client in a perpetual contract without the possibility of withdrawal. This lack of clarity can lead to unfair practices, as the client should always have the ability to know the terms of the agreement, including when it ends.

Claiming any undisclosed amount of compensation prior to a contractual agreement breaches the duty of honesty to the client. It is essential for dealerships to maintain transparency about their financial arrangements, ensuring that clients are fully informed about any fees or commissions that may affect the deal they are entering into.

Exercising an option to purchase without revealing profit to the consumer raises ethical concerns as well. Customers have the right to understand how a transaction may financially benefit the dealer, and failing to disclose this profit can exploit the consumer's lack of knowledge.

Overall, all of these actions contribute to a lack of integrity and accountability in business practices, which is why they are deemed unlawful for a dealer. Ensuring ethical standards in sales fosters trust and supports a healthy market environment.