Which of the Following Observations Is an Example of a Negative

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

A) When a group of adults increases their intake of fruits and vegetables,the percentage of people in the group who have high blood levels of vitamin C levels increases.
B) When a group of people decreases their physical activity levels,the percentage of people in the group with healthy levels of body fat decreases.
C) When a group of older adults increases their intake of high-fiber foods,the percentage of people in the group who develop intestinal cancer decreases.
D) When a group of children eat more sugary foods,the percentage of children in the group who develop two or more decayed teeth increases.