What is required in all advertisements by a licensee?

The requirement for all advertisements by a licensee is to include the licensee's legal or trade name and address. This is crucial for transparency and ensures that consumers know who is behind the advertisement. Including the legal or trade name helps to establish legitimacy and allows potential clients to identify the licensed entity responsible for the services being advertised. Providing an address further reinforces accountability, as customers can find the business easily if needed.

The other choices, while potentially relevant in certain contexts, do not fulfill the mandatory requirements for advertisements. A promotional image might enhance an advertisement but is not a prerequisite. A personal phone number may be included for contact purposes but is not a requirement across all advertisements. Finally, listing employees is not necessary for compliance and may not serve a practical purpose in many advertisements. Thus, the inclusion of the licensee's name and address is the essential component for lawful advertising practices in this context.