Which sentence shows that human civilization has been positively affected by the discovery of copper? A) “In the meantime, from around 5000 BC, early metalsmiths used trial and error to hone the process of the production of copper.” B) “It is estimated that ten thousand tons of copper ore were mined throughout ancient Egypt to create the three hundred thousand chisels needed.” C) “The making of copper tools initiated a spectacular growth in human technology, being instrumental in the birth of other technologies, cities, and the first great civilizations.” D) “It is estimated that the copper chisels would have needed to be sharpened every few hammer blows in order for them to be useful.”