有谁能帮我看看这题GWD6-11

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.

这题A ,有过好多讨论，LZ可以试着搜索一下老贴。

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（指1996年）.

如果说比之1992年少了9000吨，就认为1996，这9000吨就都是非法捕捞的，就说明，1996年和1992年的的捕捞量是基本持平的。非法捕捞没有在这几年造成很大的损失。

A touch the point.

叹气，完全不明白的说