GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - XWMI7F1E7PF45757J

The conservationists' recommendation as described is based on which of the following assumptions? A. The capacity of any illegal channels that may exist for the sale of ivory in export markets cannot expand to meet demand in those markets B. There now exist synthetic substitutes for ivory that are essentially indistinguishable from the natural product C. Bans on imports of ivory need to be combined with intensified efforts to stop poaching in order to be effective D. To the economies of those countries that have significant elephant herds, elephants are more valuable alive than dead E. In some parts of Africa where poaching has depleted elephant herds, those herds are already beyond recovery