The certificate of registration should be prominently displayed in each dental office where you work. (Option C).
What should certificate of registration display?
The specific requirements for displaying a certificate of registration may vary depending on the jurisdiction and the regulations governing dental professionals.
In general the certificate of registration should be prominently displayed in each dental office where you work, is a common requirement in many jurisdictions.
This ensures that patients and other stakeholders can easily verify the dentist's credentials.
Thus, option C is the correct answer.