What kind of requirements can the commission adopt or change?

The commission has the authority to adopt or modify requirements related to licenses for individuals seeking to practice esthetics, which is why the correct choice is focused on applicant requirements for any license. This includes establishing educational qualifications, examination standards, and any other criteria necessary to ensure that practitioners meet the professional standards required for safe and effective practice.

In contrast, while marketing strategies, salary regulations, and public relations practices may be important for salons and professionals, they typically fall outside the jurisdiction of the commission's regulatory framework. These areas are more related to business operations and individual career choices rather than the formal licensure requirements overseen by the commission. Therefore, the emphasis on applicant requirements reflects the commission's role in safeguarding public health and safety by ensuring that those entering the field are adequately qualified and trained.