Regarding stress and the immune system, which of the following statements is FALSE?

a. As part of the body's self-protective response, the body releases substances that increase inflammation.
b. Upsetting emotions, such as anger and hostility tend to strengthen the immune system response.
c. Stress management has been shown to reduce the severity of cold and flu symptoms.
d. Support groups, relaxation exercises, and guided imagery have been shown to boost immune system functioning.

B