Final answer:
The correct answer is B, Duty to protect. When a client exhibits violent behavior towards another client, it is the professional's duty to take appropriate action to protect the potential victim.
Step-by-step explanation:
The correct answer is B. Duty to protect.
When a client is exhibiting violent behavior towards another client, it is the duty of the professional to take appropriate action to protect the potential victim. This duty to protect is a legal and ethical obligation to ensure the safety and well-being of individuals in a professional setting.
For example, if a therapist or counselor observes a client being violent towards another client, they may need to intervene by separating them, contacting security, or notifying the authorities.