Final answer:
The best approach when dealing with a combative dementia patient is to remain calm and identify the trigger of the behavior, approach with empathy, and apply de-escalation techniques rather than using physical force or isolation.
Step-by-step explanation:
When dealing with a dementia patient who has become combative and verbally abusive, the most appropriate action is D. remain calm and try to figure out what triggered the behavior change. Understanding the cause of the aggressive behavior is vital in order to address the patient's needs and de-escalate the situation. Restraints and isolation should only be used when absolutely necessary and are not generally considered best practice due to the potential for increased agitation and distress. Training and education for caregivers on how to handle such situations are essential. Approaching the situation with empathy and patience is key in providing effective care for dementia patients.