【正确答案】 C

【答案解析】[详细解答] 本题考查考生对细节的理解能力。文章一开始即谈到：“Since the dawn of human ingenuity，people have devised ever more cunning tools to cope with work that is dangerous，boring，burdensome...”这是一个过去完成时，反过来也可以这么说：“Since people devised ever more cunning tools to cope with work...”，“demonstrate human ingenuity has began”，其中，“dawn”意为“demonstrate”，“devised”意为“in vented”。故[C]为正确答案。