单选题What are not the resulting effects on cities when those people moved out?AThere were more crimes.BCities were in a bad condition.COnly one mass transit system was completed.DSome small companies move in while larger ones moved out.题目答案D您的答案答案解析32.答案为D。根据全文,选项A、B、C在文中均提到是迁移的后果,而选项D没有提到。D