应该选A这里不需要用常识。我们看because in the communities studied, women were much more likely to do regular volunteer work than men were, and women tend to live longer than men do. 这道题目实际上就是要在选一个原因来解释为什么会得到更多从事志愿工作的人会更长寿这个统计结果。而A中说了产生这样的统计结果是因为女性更多的从事志愿工作并且女性本身就比男性活的更久。 还有D选项it is rare for a person to keep up a regular schedule of volunteer work throughout his or her life. 这只能推断出统计的样本小,并没有直接说明统计结果产生的原因。