What Are the Potential Effects of Increased Levels of Stress

What are the potential effects of increased levels of stress hormones in stress response?

A) Among the aged, deficits in problem-solving skills and dementia may develop.
B) The ability of the hippocampus to "turn off" the body's stress response may be compromised.
C) The high level of stress hormones will cause the stress response to stop.
D) Both a and b