Question

Swedish researchers investigated the relationship between chocolate consumption and stroke. the researchers gave a questionnaire about eating habits to a randomly selected sample of swedish men. based on the responses to the questionnaire, the men were classified into two groups. group a consisted of the 9,250 men who ate the most chocolate per week, and group b consisted of the 9,250 men who ate the least chocolate per week. the researchers tracked the men's health for ten years. during that time, there were 458 cases of stroke among the men in group a and 543 cases of stroke among the men in group
b.

Answer 1

The men in group A who consumed the most chocolate per week has a lower cases of stroke compare to group B because  high chocolate consumption was associated with a lower risk of stroke. In laboratory studies, dark chocolate contain flavonoids that have been shown to have an antioxidant, antiplatelet, and anti-inflammatory effect that may lower cardiovascular diseases. 

Answer 2

Eating Chocolate can reduce risk of stroke in men.  Flavonoids in chocolate  is believe to be a good effect against stroke.. Flavonoids has antioxidant, anti-clotting and anti-inflammatory properties, which is  protective against cardiovascular disease.  Flavonoids in chocolate is also believed to decrease blood concentrations of bad cholesterol and reduce blood pressure.