Which of the following is an example of a compliance violation in a cannabis operation?

Selling products without required testing is indeed a compliance violation in a cannabis operation because it directly contradicts regulatory standards intended to ensure consumer safety and product quality. Cannabis products must go through rigorous testing to check for potency, contaminants, and other key factors to ensure they are safe for consumption. Failing to conduct these tests can lead to harmful products reaching consumers, which regulatory bodies aim to prevent through laws and compliance measures.

The other options do not represent compliance violations in the same way. Employing a specific number of staff members is typically regulated but not inherently a violation unless it exceeds the limits set by local laws. Offering loyalty discounts can encourage customer retention and is usually allowed unless particular restrictions apply. Advertising on social media may be subject to regulatory scrutiny but is not a violation per se, particularly if it adheres to prevailing advertising guidelines within the cannabis industry. Thus, compliance pertains specifically to adhering to quality and safety standards, which is clearly illustrated in the requirement for product testing.