A panel of nutritionists recently discussed healthy eating habits. One nutritionist argued that since many people who eat organic food are generally healthier, eating organic food must make a person healthy. However, another nutritionist pointed out that people who choose organic foods often lead healthier lifestyles overall, which may contribute to their good health.
This discussion highlights the relationship between food choices and health. Based on this reasoning, which of the following identifies the flaw in the first nutritionist's argument?