【正确答案】
B
【答案解析】[听力原文]
The international body trying to protect endangered species says that
African elephants are faced with extinction if the current rate of illegal hunting for ivory continues.
In its report, Cites says that illegal hunting is still increasing in some areas.
Twenty thousand elephants were illegally killed in Africa last year, the report shows. That figure far exceeds the growth rate of the elephant"s population, in some regions of Africa. Elephants are threatened with extinction. The report also documents a clear increase in the number of large seizure—amounts of over 500 kilograms—of ivory in Africa.
For the first time, there were more such seizures in Africa than in Asia, an indication, the report suggests, of the involvement of more transnational organized crime in illegal ivory trade.
What has resulted in the massive killing of elephants in Africa?
[解析] 新闻开始提到，如果人们为了象牙而继续偷猎的话，非洲大象将濒临灭绝。此外，新闻中还提到被没收的象牙数量以及跨国犯罪集团从事的非法象牙交易等。由此可知，偷猎大象以获取象牙导致非洲大象被大量屠杀，故答案为B。