Which Psychologist Is Using a Biopsychosocial Approach to Psychotherapy

Which psychologist is using a biopsychosocial approach to psychotherapy?

A) Dr. Yan, who creates a unique therapeutic strategy for each of his clients
B) Dr. Eisner, who requires her clients to have a complete blood workup before initiating therapy
C) Dr. Pohl, who shadows his clients in their daily lives to gain a better understanding of their stressors
D) Dr. English, who monitors her clients' physiological parameters (e.g., heart rate, perspiration) to get a better read on their feelings