24套版GWD—14 附自己的观点

eshopaholic

Some species of Arctic birds are threatened by recent sharp increases in the population of snow geese. 威胁是最近造成的

B.    It has been many years since the restriction led to the hunting season for snow geese being closed earlier than the scheduled date.

而这个政策的效果已持续多年.  说明restriction与sharp increses之间并无因果关系。  选B，削弱