Which of the Following Statements Best Describes the Relationship Between

Which of the following statements best describes the relationship between stress and physical illness according to psychoneuroimmunologists?

A) Stress compromises the body's immune system,leaving a person vulnerable to illness.
B) Stress increases the production of natural killer cells,which causes cell death and leads to illness.
C) Stress causes high blood pressure,heart disease,and cancer.
D) Stress has no direct relationship to physical illness,though physicians tell us that these things are related so that we will be more willing to take unnecessary medications.