Which of the following would NOT be a violation of state insurance regulations?

The correct choice highlights a scenario where an agent is operating within the parameters set by state insurance regulations. An agent using their license to write only business other than controlled business means they are not prioritizing their own financial interests over those of their clients. Controlled business typically refers to insurance written where the agent has a personal interest, such as coverage for themselves or immediate family members. By focusing only on other types of business, Agent C adheres to regulations designed to avoid potential conflicts of interest.

In contrast, the other options involve actions that breach regulatory guidelines. Collecting premiums and depositing them into a personal account is unethical and undermines the trust and financial integrity required in insurance transactions. Writing insurance solely for oneself or family is also problematic, as it can lead to conflicts of interest and diminish the agent's obligation to serve the broader community. Charging clients additional fees beyond the premium raises concerns about fair practices and transparency in the insurance industry. Therefore, Agent C's actions align with state regulations by ensuring the focus remains on serving clients effectively and ethically.