Which Is the Best Description of the Field of Psychoneuroimmunology

Which is the best description of the field of psychoneuroimmunology?

A) Examining patterns of thinking and behaving that are maladaptive, disruptive, or uncomfortable
B) The study of the interaction of psychological and physiological processes that affect the body's ability to defend itself against disease
C) The discipline that looks at the relationship between the physical characteristics of environmental stimuli and the psychological experience those stimuli produce
D) The scientific study of psychoactive drugs and their effects