Final answer:
Carl Rogers emphasized three essential therapeutic conditions for the success of psychotherapy in client-centered therapy: unconditional positive regard, genuineness, and empathy.
Step-by-step explanation:
American psychologist Carl Rogers, renowned for developing client-centered therapy, believed that for psychotherapy to be successful, three essential therapeutic conditions must be present: unconditional positive regard, genuineness, and empathy. Unconditional positive regard entails accepting and supporting the client without judgment. Genuineness is when the therapist is sincere and transparent with the client. Lastly, empathy involves the therapist understanding and sharing the feelings of the client. Rogers asserted that these conditions enable individuals to work through their issues, fostering self-discovery and personal growth.