问题详情

It found that eating vegetables appears to help keep the brain young and may slow the mental decline sometimes associated with growing old. Older people who ate more than two servings of vegetables daily appeared about five years younger at the end of the six-year study than those who ate few or no vegetables. That may be because they contain healthy amounts of vitamin E, an antioxidant that is believed to help fight chemicals produced by the body that can damage cells.请帮忙给出正确答案和分析，谢谢！