Which of the following observations is an example of a positive correlation?

A. When women gain less weight than average during pregnancy, the birthweights of their babies tend to be lower than average.
B. When a population's intake of green tea increases, the percentage of lung cancer cases in that population decreases.
C. When a group of children increases their physical activity levels, the percentage of the children who contract cold infections decreases.
D. When members of a population consume fewer fruits and vegetables, their risk of high blood pressure increases.


Answer: A

Nutritional Science

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