When working with his clients, Dr. Chen listens carefully to their words and tries to demonstrate empathy and genuineness. His goal is that clients will engage in honest and accepting self-examination. Dr. Chen is MOST likely a therapist.

Humanistic

Explanation:

Humanistic  therapist is the therapist who is responsible for dealing and approaching mental health issue of people. They treat challenges faced by people in terms of health and mental level as everyone persist different level of mental perception and understanding.

According to the question,Dr. Chen is humanistic therapist as he is indulged in self examination of people and understanding their mind through empathy and listening carefully to them so that their mental wellness can be maintained.

the answer to your question is,

old stone age.

-mabel < 3