Grant is in college and studying for his midterm exams, so he really doesn't want to get sick. if he wants to be proactive about staying healthy, what is his best option?

get regular exercise and eat a balanced diet, because this boost energy and increase immunity against disease.
take vitamins and drink energy drinks, because this will prevent germs from entering the body and causing an infection.
exercise and get plenty of sleep, because this will build muscles and white blood cells that will fight off infection.
get plenty of sleep and take vitamins, because this the body work harder even when it is fighting an infection.
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