Final answer:
The correct option for the CNO practice standard related to relationships is d. therapeutic and professional, emphasizing caring behaviors and professional boundaries within the nurse-client relationship.
Step-by-step explanation:
The CNO (College of Nurses of Ontario) Practice Standard: Professional Standards includes a standard statement related to relationships. The correct option is d. therapeutic and professional. This standard emphasizes that nurses are expected to establish and maintain such relationships with their clients. It involves demonstrating caring behaviors and professional boundaries, and maintaining a necessary level of professionalism within the nurse-client relationship.