单选题 The______ of the system of regional autonomy for ethnic minorities has underground long periods of exploration and practice.
【正确答案】 B
【答案解析】解析:考查名词辨析。句意为“民族区域自治制度的建立经过了长期的探索和实践”。foundation“基础”;establishment“成立,建立”;setting“环境,安装”;settlement“解决,处理”。故选B。