帮忙看一下这个句子的语法,
managers in non-profit organizations strongly believed that conflict was beneficial to their organizations and that it promoted higher quality decision making than might be achieved in the absence of conflict.
1 and后的that去掉行不行,感觉去掉了也读得很顺,如果不能,为什么
2 than 后面为什么没有跟被比较物,加一个what行不行