PMP考试

试题来源：PMP认证考试练习题及参考答案（九）
The "rolling wave" or "moving window" concept is used most frequently on projects where: 
A The baseline is frozen for the duration of the project and no scope changes are permitted 
B Marketing is unsure of what the customer actually wants and reserves the right to make major scope changes 
C The low levels of the work breakdown structure are known with certainty for the next three to six months, but the remaining tasks are based upon the results of the first three to six months of work 
D Networking techniques are not appropriate 
E All of the above 

试题出处：http://www.examtiku.com/shiti/954922566.html
网考网参考答案：C
网考网解析：进入考试题库查看解析
大数据分析：根据网考网与考试题库的统计分析，该试题：
53%的考友选择了A选项
6%的考友选择了B选项
38%的考友选择了C选项
1%的考友选择了D选项
2%的考友选择了E选项
考友解析与评论：
 · 我觉得C也不对
 · 答案是什么啊，这题比较模糊
 · 我也是这么错的