According to Chris Tether, what does benchmarking involve? ( )

参考解析：

定位第二段"Benchmarking involves learning about your own practices, learning about the best practices of others, and then making changes for improvement that will enable you to meet or beat the best in the world." The essential element is not simply imitating what other companies do but being able to adapt the best of other firms' practices to your own situation.可知，最好的做法并不是模仿，所以B错误。A选项和D选项，文章没有提及合作和改变做法的事情。选项A：与其他有更好实践的公司合作；选项B：模仿业内最好的公司的做法；选项C：将你自己的实践与这个领域的最佳实践进行比较；选项D：总是改变自己的做法。故本题正确答案选C。