Sheldon Cohen and His Colleagues (1991,1993)exposed Some Participants to the Virus

Sheldon Cohen and his colleagues (1991,1993) exposed some participants to the virus that causes the common cold and exposed other participants to an inert saline solution.They found that the more stress participants reported,the more likely they were to contract colds.Results of this study suggest that

A) interpretations of stress are more important than objective stress.
B) contracting a cold is often perceived as stressful.
C) physical illness can make us more susceptible to stress.
D) exposure to viruses can be a source of stress on the immune system.
E) stress can negatively affect our immune systems.