I believe the correct answer is C. The problem-and-solution structure establishes how the problem came to be, describes the potential outcomes, and suggests actions for resolution.
Explanation:
Roosevelt's famous speech about conservation does indeed refer to history - both American and the whole world's history. But it only does so in order to provide a deeper insight into the nature of the problem. <u>He uses historic references to outline the problem (exhaustion of resources). Then, he proposes solutions to this problem.</u>
True, America's natural resources were a great driver of economic and national growth. However, according to Roosevelt, <u>if Americans don't adopt a new perspective and start thinking about their posterity, soon there won't be much left to work with</u>. There are two categories of resources, each of which require a separate course of action:
Exhaustible resources such as metals and minerals. The exhaustion can't be stopped, but it can be deferred until, hopefully, scientists come up with something to replace them.
Renewable resources such as wood, water, soil. It is possible to prevent their exhaustion, but it's also possible to improve them for future generations.
