天山 9-15 请教，好像没有讨论过

T-9-Q15.
   

The commission’s office of compliance, inspection, and investigations plans to intensify its security of stock analysts to investigate not only whether research is an independent function at brokerage firms, but also whether conflicts results when analysts own the stocks they write about or when they are paid
   for their work by a firm’s investment banking division.

A.      to investigate not only whether research is an independent function at brokerage firms, but also whether conflicts results when analysts own the stocks they write about or when they are

B.       to investigate not only whether research is an independent function at brokerage firms, but also if conflicts results when analysts own the stocks they write about or they are

C.      to not only investigate whether or not research is an independent function at brokerage firms, but also if conflicts results when analysts own the stocks they write about or are

D.      not only to investigate whether or not research is an independent function at brokerage firms, but also whether conflicts result when analysts own the stocks they write about or are

     E    not only to investigate whether research is an independent function at brokerage firms, but also whether conflicts result when analysts own the stocks they write about or when
  

     E    not only to investigate whether research is an independent function at brokerage firms, but also whether conflicts result when analysts own the stocks they write about or when
  

这个题答案是A，确实A的平行很工整，但but also whether conflicts results....是什么成分呢？我的理解是conflicts 做主语，results做谓语，冲突是否发生。所以如果这样理解的话，results就是错的，主语是复数不加s才对。不知道是不是我的什么地方理解错误，请高手指教， 多谢！

我选择的是E，D的最后一个or缺少when连接词，会产生是conflicts are的歧义

希望大家讨论