300难题

Kristan

请教大佬们一个300难题

The overall slackening of growth in productivity is influenced less by government regulation, although that is significant for specific industries like mining, than the coming to an end of a period of rapid growth in agricultural productivity.

• A
  
  the coming to an end of
  
  
• B
  
  the ending of
  
  
• C
  
  by the coming to an end of
  
  
• D
  
  by ending
  
  
• E
  
  by the end of
  
  
  

C D E选项中是怎么选出C的

长丝弓

(C) 语法句意都正确


(D) 语法无误，但该选项句意改变成：产率的slackening是由于结束一个迅速增长期造成（而原意是：由于迅速增长期结束的到来而造成的，是该时期的结束造成了slackening; 而不是make该时期end，再造成slackening）