The aim of the study in the [i]Journal of the American Geriatrics Society[/i] is____. A: to see whether people’s personality affects their life span B: to find out if one’s lifestyle has any effect on their health C: to investigate the role of exercise in living a long life D: to examine all the factors contributing to longevity

The aim of the study in the [i]Journal of the American Geriatrics Society[/i] is____.  未知类型：{'label': 'questionDesc', 'content': '请根据材料选择正确答案。', 'isMemberControl': 0, 'type': 181} 未知类型：{'label': 'source', 'content': '2016年6月 四级 卷一 仔细阅读2', 'isMemberControl': 0, 'type': 181} A: to see whether people's personality affects their life span B: to find out if one's lifestyle has any effect on their health C: to investigate the role of exercise in living a long life D: to examine all the factors contributing to longevity