In paragraph 4, why does the author mention that "Pre-Roman Britain was highly localized, with people rarely traveling beyond their own region"? A. To suggest that the Roman conquest of Britain increased the standard of living for natives B. To indicate that pre-Roman Britain was more interested in festivals and community life than conquering other regions C. To explain why architecture during this period was not built to be particularly large D. To illustrate how the traditional roundhouse evolved under the influence of Roman civil architecture