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.
the coming to an end of
the ending of
by the coming to an end of
by ending
by the end of
划线部分根据平行对象可以看出是一个名词性质的词,排除ABD
根据句意是在快到结束而不是在结束,排除E,选C
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