The answer is letter D.
Headaches and elevated blood pressures are physiological symptoms of stress. When a person is experiencing high levels of stress, bodily functions and chemical processes within the body become imbalanced. Stress causes the heart to pump extra and the brain produces high levels of chemicals to trigger a protective response to stressors. People who experience chronic stress tend to develop other diseases (e.g. heart failures, stroke) that may lead to death. In order to manage stress a person must engage in breathing and relaxing exercises that may return the body back to its homeostasis.