What is one of the grounds on which the license of a dealer may not be denied, revoked, or suspended?

The correct answer highlights a significant aspect of compliance in the motor vehicle sales industry. Employed a properly licensed salesperson is a foundational requirement for vehicle dealers, ensuring that all sales activities are conducted by individuals who are knowledgeable about the state's regulations and laws. This requirement exists to protect consumers and maintain a standard of professionalism in the industry. A dealer who employs a properly licensed salesperson demonstrates that they adhere to the necessary legal and operational standards, which supports their credibility and reputation as a business.

The other options do not provide grounds for defending a dealer's license against denial, revocation, or suspension. For instance, failing to advertise inventory would typically relate to a dealer's marketing strategy rather than their compliance with licensing regulations. Similarly, not keeping customer records can lead to a range of compliance issues affecting consumer protection, and using misleading advertising is more directly tied to ethical considerations and potential legal violations that could lead to disciplinary action. Therefore, employing a properly licensed salesperson is a strong indicator of a dealer's regulatory compliance and a protective measure for both the business and consumers, making it a valid ground against adverse licensing actions.