Final answer:
Maintaining an appropriate level of professional expertise through continuous learning is an indication of credibility under the Standards of Ethical Conduct.
Step-by-step explanation:
Maintaining an appropriate level of professional expertise is an indication of credibility under the Standards of Ethical Conduct. This involves continuously developing knowledge and skills in order to stay up-to-date in your field. By doing so, you demonstrate a commitment to excellence and are more likely to be seen as credible by your peers, clients, and employers.
For example, a software engineer who regularly attends conferences, takes courses, and stays informed about the latest developments in their field is more likely to be considered credible by their colleagues.