Final answer:
Residential rental locators are required to prominently display their license in a place that is accessible to clients and prospective clients.
Step-by-step explanation:
The correct answer to the question is A. Residential rental locators. According to regulatory requirements in many jurisdictions, residential rental locators are mandated to visibly display their license in an area that is accessible to both clients and prospective clients.
This rule is designed to ensure transparency in the rental market and to provide an assurance of credibility and legitimacy to those seeking rental properties. In contrast, salespeople, brokers, and listing agents may have different requirements depending on the specific rules and regulations governing their professions.