单选题 The likelihood of America's exhausting her natural resources is growing less. All kinds of waste are being recycled, and new uses are constantly being found for almost everything. We are getting more use out of what we produce, and are manufacturing many new byproducts out of what we formerly threw away. It is, therefore, unnecessary for us to continue to ban logging in national parks, nature reserves, or areas inhabited by endangered species of animals.

Which one of the following most seriously undermines the conclusion of this argument?
A. The increasing amount of recycled material made available each year is equal to one-tenth of the increasing amount of natural material consumed annually.
B. Recent studies have shown that the number of endangered animals throughout the world fluctuates sharply and is chiefly determined by changes in meteorological conditions.
C. The logging industry contributes huge sums of money to political campaigns in states where it has a financial interest.
D. The techniques that make recycling possible are constantly improved so that more is reclaimed for lower costs each year.
E. Political contributions by the recycling industry are now greater than those of either the logging or animal protection interests.