谁能帮我解释下这道逻辑题。

txsnowsea

In 1992 outlaw fishing boats began illegally harvesting lobsters from the territorial waters of the country of Belukia.Soon after, the annual tonnage of lobster legally harvested in Belukian waters began declining; in 1996, despite there being no reduction in the level of legal lobster fishing activity, the local catch was 9,000 tons below pre-1992 levels.It is therefore highly likely that the outlaw fishing boats harvested about 9,000 tons of lobster illegally that year.


Which of the following is an assumption on which the argument depends?

1. The illegal lobster harvesting was not so extensive that the population of catchable lobsters in Belukia’s territorial waters had sharply declined by 1996.
   
2. The average annual lobster catch, in tons, of an outlaw fishing boat has increased steadily since 1992.
   
3. Outlaw fishing boats do not, as a group, harvest more lobsters than do licensed lobster-fishing boats.
   
4. The annual legal lobster harvest in Belukia in 1996 was not significantly less than 9,000 tons.
   
5. A significant proportion of Belukia’s operators of licensed lobster-fishing boats went out of business between 1992 and 1996.
   

Answer: A

gwang5

1996年，合法捕捞的龙虾比1992年的合法捕捞量少了9000吨。选项1认为是可捕龙虾总量实际没有减少，少捞的这9000吨都是非法捞走的。

lonelyorchid

非法捕鱼船从1992年开始在B的国家的海域非法捕龙虾。很快，每年合法捕捞的龙虾的总重量开始下降。1996年，尽管合法捕捞的活动并没有减少，但是捕捞的总量却较1992年以前少了9000吨。因此，很有可能在那一年，非法捕捞的龙虾的重量就是9000吨。
问假设

A。非法捕捞没有严重到使得1996年可以在B的海域捕捞到的龙虾的数量锐减。
B。从1992年开始，非法捕捞的龙虾的重量呈上升趋势
C。作为一个整体，非法捕捞的龙虾没有合法捕捞的多
D。1996年在B捕捞的龙虾并不显著地少于9000吨
E。有很大比例的合法渔船在92-96年间离开了这个行业。

读懂了题目就没有解释的必要了吧？

sdcar2010

Just use negation and you will be happy to find A as the answer.