I know I have to go to bed early, but I ca n’t help staying up late. I know that smoking and alcohol are harmful to my health, but I ca n’t stop the temptation of tobacco and alcohol. I know that sports are good, but I ’m too lazy to walk . There is no lack of common sense of health, they are more of a lack of self-discipline. People who are self-disciplined will go to bed early, will not eat, and insist on exercise. If a person adheres to the spirit of self-discipline, he will not indulge himself and can maintain his own circadian rhythm. And lead a healthy and happy life. Based on the above statement, which of the following can be derived? ['All people who exercise are disciplined.', 'Some people who lack self-discipline do not lack the common sense of health.', 'If one does not adhere to the spirit of self-discipline, he will indulge himself.', 'People who maintain their own circadian rhythm can lead to healthy and happy lives.']