Write the next sentence in the following story.

How to heal a broken heart
Get moving with a little exercise.
Go to the gym, go for a jog in the park, or just get outside for a brisk walk. Physical activity increases the amount of serotonin in the brain, which acts like a natural antidepressant and improves your mood.

Choose from:
a). Your heart rate and blood pressure elevates when you exercise. Exercise is a mood booster, which in turn helps you recover.;
b). If you typically exercise too, try buffing your skin. This removes dead skin cells, making your heart beat faster.;
c). The more you are active, the better the mood you have. You may be surprised that once you begin taking steps you can get up and move, maintaining your fitness and helping you manage your emotions.;
d). You'll also have more energy and feel better about yourself in general. Take some group fitness classes or hit the gym with a buddy.;. The answer should be
d).