Borrow more money would be the most fitting. When you think about what interest rates are it is the cost of borrowing an amount of money until it can be repaid.<span />
A "rational" use would mean a compromise between different interest and would also take into account scientific knowledge. Therefore neither a complete ban or unconditional permission on lumbering are rational.
A correct answer is
D. National forests should be protected to make the best use of the nation's natural resources.
Answer:
restriction of interest to a narrow sphere; undue concern with local interests or petty distinctions at the expense of general well-being.
