A、No hormone is released any more. B、The body cannot feel the stress. C、A new hormone is released. D、A hormone causing stress is

Listening to music is one of the most common ways we manage our stress and emotions.
    When we feel tired after a long day at work, many of us like to relax by closing our eyes, and turning on our iPods. Or when we feel down after a heated argument with a boyfriend or girlfriend. we may listen to some uplifting tunes to help distract us from our anger or sadness.
    Even at this very moment, I’m listening to some calm instrumental rock music, because it helps me stay relaxed and focused when I’m writing.
    These are just some of the ways we use music to improve our psychology. And more and more research is beginning to show that music can serve a very positive function in our everyday life.
    In a study done by University of Gothenburg in Sweden, it was found that participants who listened to music after a stressful episode in their everyday life reported decreased levels of stress when compared to individuals who didn’t listen to music after a stressful episode.
    And in another study done by the same team of researchers, it was found that hstening to music was an effective way to reduce a hormone commonly released when we are experiencing stress. This suggests that listening to music can have a real biological effect on our mental health.
    Listening to music can be a big part of art therapy, and these new studies are consistent with a growing body of research that shows the benefits of music on our stress and anxiety.
19. Why do we listen to some uplifting music after arguing with friends?
20. What was found in the study done by University of Gothenburg in Sweden?
21. What is the biological effect of listening to music?