Researchers said the findings were partly related to better education and higher class, but it remained statistically significant after adjusting for these factors.

　　Vegetarians were more likely to be female, to be of higher social class and to have higher academic or vocational qualifications than non-vegetarians. However, these differences were not reflected in their annual income, which was similar to that of non-vegetarians.

　　Lead researcher Catharine Gale said, “The findings that children with greater intelligence are more likely to report being vegetarians as adults, together with the evidence on the potential benefits of a vegetarian diet on heart health, may help to explain why a higher IQ in childhood or adolescence is linked with a reduced risk of coronary heart disease in adult life.

　　But Dr Frankie Phillips of the British Dietetic Association said，“It_ is_ like _the _chicken

　　_and _egg. Do people become vegetarians because they have a very high IQ or is it just that they are clever enough to be more aware of health issues？”

　　21．What’ s the result of the research mentioned in the text?

　　A. Intelligent children are more likely to become vegetarians later in life.

　　B. Children with a higher IQ are less likely to have heart disease later in life.

　　C. Intelligent children tend to belong to higher social class later in life.

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