Dr. Rogers, a therapist, listens to his patient Bill as Bill describes how he feels about himself. Bill expresses very low self-esteem and Dr. Rogers empathizes with him. Bill feels free to express himself to Dr. Rogers due to his patience and acceptance. What type of therapy is Dr. Roger's expressing? 

a. Psychosomatic

b.  Insight therapy 

c. Psychoanalysis

d.  Client-centered therapy 

e. Exposure therapy