题目解析:
根据likewise得知是并列关系,插入句意思是”同样地,公开市集集体做决定的过程不再实用。“说明正确选项前面的内容跟这句话类似,第3空前一句话“it was no longer possible to be a jack-of-all-trades.” 跟插入句类似,但是因为原文中后一句”One now had to specialize, and with specialization came professionalism.”是紧跟着前一句话的进一步补充,两句衔接紧密不可以插入内容,所以放在最后一个空的位置。