Final answer:
The maximum penalty for acting as an agent without a license is $25,000 (option D).
Step-by-step explanation:
The maximum penalty for acting as an agent without a license is $25,000 (option D). This means that if someone engages in activities that require a license but does not have the necessary license, they can be fined up to $25,000. It is important to follow licensing requirements to avoid legal consequences and to ensure the protection of consumers and the integrity of the profession.