细节理解题。答案出自第一段: A consensus in the present hence can be achieved only through a shared understanding of the past, as Homer’s epics informed those who lived centuries later what it meant to be Greek….此处的as即表示了对前面内容的补充说明，而句中的a consensus in the present hence can be achieved only through a shared understanding of the past体 现出A选项中的the role of the shared fantasies about society。