Professor McLeod Says, "Psychological Factors Can Influence Physical Processes by Producing

Professor McLeod says, "Psychological factors can influence physical processes by producing physiological changes in the immune system. For hundreds of years, health care professionals have understood this connection between psychological and physical factors. However, psychological conditions cannot influence neural and biological systems. Additionally, a person's beliefs about the causes, symptoms, duration, and curability of a disease do not affect that person's willingness to seek treatment and follow through with it." Which part of Professor McLeod's statement is accurate ?

A) Psychological factors can influence physical processes by producing physiological changes in the immune system.
B) For hundreds of years, health care professionals have understood this connection between psychological and physical factors.
C) Psychological conditions cannot influence neural and biological systems.
D) A person's beliefs about the causes, symptoms, duration, and curability of a disease do not affect that person's willingness to seek treatment and follow through with it."