Followers of which therapy believe that each client is a unique person deserving human worth and dignity

Followers of Existential–Humanistic psychotherapy believe that each client is a unique person deserving human worth and dignity.

The Existential–Humanistic approach focuses on the unique consciousness and individuality of each person. This approach claims that to accurately understand a person and help them, we need to know his or her unique perception of reality. Only when therapists understand their clients perceptions of reality and unique consciousness without judgement or disapproval, they can help their clients effectively. 

The answer should be a.