What steps are being taken to ensure that copper will continue to be available in the future?

Prospecting is the process of searching the region for mineral deposits. will likely not be mined at this time, but may be mined one day in the future, either. With some information available about the concentration of the ore.  At this stage, just enough development of the mine site is performed to ensure that it will be

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

the answer is c i believe