Which of the following might be considered a key supporting detail that a writer would use in an objective
summary for "Principles of Conservation" by Gifford Pinchot?
O When at length we came to see that the control of logging in certain directions was profitable, we found it had long been
possible.
O The first principle of conservation is development, the use of the natural resources now existing on this continent for the
benefit of the people who live here now.
O It applies as much to the subject of good roads as to waterways, and the training of our people in citizenship is as
germane to it as the productiveness of the earth.
O More coal and more iron are required to move a ton of freight by rail than by water, three to one.