Which of the following is true regarding the relationship between nutrition and intelligence?
A) There is no correlation between intelligence and nutrition.
B) There is a relationship between intelligence and nutrition, but only when comparing children living in poverty and those in affluent households.
C) Even when comparing children who come from affluent households, there is evidence for a relationship between healthy eating and intelligence.
D) Intelligence is correlated with the number of calories consumed, but not the nutritional value of a child's diet.
Answer: C
Rationale: According to a Spanish study, even among high-socioeconomic grade-school children, there is a statistically significant relationship between nutrition and intelligence. This relationship holds even after influences of gender and income are removed from the analysis. As for children who may not consume balanced diets, there is even evidence that nutritional supplements can help overcome this factor.
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