Which Psychologist Is Using a Biopsychosocial Approach to Psychotherapy

Which psychologist is using a biopsychosocial approach to psychotherapy?

A) Dr. A, who creates a unique therapeutic strategy for each client without adopting a single theoretical orientation
B) Dr. B, who requires clients to have a complete blood workup before initiating therapy
C) Dr. C, who shadows clients in their daily lives to gain a better understanding of their stressors
D) Dr. D, who monitors clients' physiological parameters (e.g., heart rate, perspiration) to get a better read on their feelings