Which list includes only lifestyle factors that people can change to improve their health?
1 having many friends, parents with heart diseases, sleeping 8 to 10 hours a night
2 a family history of diabetes, lack of energy, thinking critically about health risks
3 knowledge of common risk factors, level of physical activity, ways of reacting to conflict
4 ways of interacting with others, changing the images in the media, resisting pressure from peers
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