在职攻硕英语考试

根据网考网考试中心的统计分析，以下试题在2019/11/10日在职攻硕英语习题练习中，答错率较高，为：42%
【单选题】The management system of the rapid transit rail lines ______.


A．is already quite developed
B．does not exist at all
C．is not good enough
D．needs to include the strict guidelines