题目

US enrollment(入学注册)of international students declined for the second year in a row, sending waves of unease across American colleges and universities, which see students from abroad as a buffer (缓冲) against the falling number of US high-school students graduating each year.The number of new international students enrolling at American institutions fell by 6.6% during the 2017-18 academic year, while a 3.3% decline the year before, according to a report by the Institute of International Education (IIE). The total number of international students in the US plus those working here on 18．从完善该城市主要功能出发，需合理布置功能，新建住宅区应选在（　　）A．甲区域B．乙区域C．丙区域D．丁区域