주어진 글 다음에 이어질 글의 순서로 가장 적절한 것은? African elephants are hunted for their ivory at far too great a rate, and these magnificent animals may be headed for extinction. While this problem may have no simple solution, it does have a simple cause: Nobody owns the elephants. (A) Ironically, the companies respond to the reduced demand for trees by maintaining smaller forests. Evidence indicates that recycling causes the world to have fewer trees. (B) Similarly, paper companies have every incentive to replenish the forests they own, and these forests are in no danger of disappearing. Concerned environmentalists advocate recycling paper so that fewer trees are harvested. (C) The demand for beef is far greater than the demand for ivory, but cattle are not threatened with extinction. The key to the difference is that cattle are owned.