What role does the HPA axis play in the body's response to stress?

• A. It activates the release of adrenaline, which increases lymphocyte production.
• B. It has no role in the body's response to stress.
• C. It activates the release of cortisol, which suppresses lymphocyte production.
• D. It activates the release of insulin, which suppresses lymphocyte production.

Answer: (C)