Final answer:
Music therapists in Ontario must be licensed by the CRPO to practice, ensuring they meet essential professional standards and are regulated.
Step-by-step explanation:
The correct answer to the question, "All the music therapists in Ontario must also be recognized by the CRPO." is D) Licensed. The College of Registered Psychotherapists of Ontario (CRPO) regulates its members, and being licensed ensures that all practitioners, including music therapists, meet the professional standards necessary to provide health services in Ontario. Music therapists must be properly licensed to practice in Ontario, which implies that they have met the required educational and professional standards set by the CRPO and are subject to regulation by the college.