Copper is a metal that is used for many purposes. it is mined from the earth using various methods. though the amount of copper in the earth's crust is very large, if the mining of copper continues, it will eventually run out. jim thinks that conserving copper is important, and says that the best way to do this would be to stop all copper mining at once. is there a problem with this solution? a) no, it is as good a solution as any. b) yes, there is no need to conserve copper. c) no, we must conserve copper no matter what. d) yes, the need to conserve copper must be balanced with use.