In 28 B.C.the jump of Roman's population partly can attribute to A.civil war's eruption B.population explosion C.extension of citizenship to Roman allies D.the censuses based on adult males
A.civil B.population C.extension D.the
【参考答案】
C 解析：事实细节题。原文第二段第三句提到，罗马人口的猛增趋势中大约有1/3可以归因于意大利全境内罗马盟国公民数......