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