Which of the Following Observations Is an Example of a Positive

Multiple Choice

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 members of a population consume fewer fruits and vegetables,their risk of high blood pressure increases.
D) When a group of children increases their physical activity levels,the percentage of the children who contract cold infections decreases.