OG12 第134题求助

虫子128

求助各位高手：

134、 Recently implemented "shift-work equations" based on studies of the human sleep cycle have reduced sickness, sleeping on the job, (fatigue among shift workers, and have raised) production efficiency in various industries.


          A  fatigue among shift workers, and have raised
          B  fatigue among shift workers, and raised
          C and fatigue among shift workers while raising
          D lowered fatigue among shift workers, and raised
          E and fatigue among shift workers was lowered while raising


疑问：D选项为什么不对呢？
个人理解：have reduced......，lowered fatigue....., and raised  这也是比较整齐的平行——此处lower是动词。
请教各位了！
谢谢！

MiaZhang

如果是LZ所说的have reduced......，lowered fatigue....., and raised  结构，那么sickness和sleeping 之间应该由and连接

并列成分一定要出现and结构的，逗号不能代替and的作用

虫子128

恍然大悟，感谢Mia Zhang！