Final answer:
Discussing a specific patient's history with another patient may trigger a deception suit against a dental hygienist.
Step-by-step explanation:
The action that may trigger a deception suit against a dental hygienist is option C: discussing a specific patient's history with another patient.
This violates patient confidentiality, which is a fundamental principle in healthcare. Patient information should be kept confidential, and it is inappropriate to discuss a patient's history with others unless necessary for their care and with their consent.
In the case of a dental hygienist, discussing a specific patient's history with another patient is a breach of confidentiality and can lead to legal consequences.