A follow-up survey of 37,000 men in a country between the ages of 49 and 75 found that nearly 2,000 of these men had suffered a stroke in 10 years. People who don't consume chocolate have a much lower risk of stroke. Researchers speculate that regular consumption of chocolate can reduce the risk of stroke. Which of the following, if true, would best support the researchers' speculation? ['Chocolate contains flavonoids and it has a stroke prevention effect.', "The researchers' similar findings on women are basically consistent with the above findings.", 'Research finds that regular consumption of chocolate cocoa regulates blood sugar levels in patients with hypoglycemia.', 'In this survey, some of the men who have suffered a stroke have a habit of eating chocolate regularly.']