帮看一道题~~~3x

uibewsj

Canadians now increasingly engage in "out-shopping", which is shopping across the national border, where prices are lower. Prices are lower outside of Canada in large part because the goods-and-service tax that pays for Canadian social service is not applied.

Which one of the following is best supported on the basis of the information above?

A. If the upward trend in out-shopping continues at a significant level and the amounts paid by the government for Canadian social services are maintained, the Canidian goods-and-service tax will be assessed at a higher rate.

E. Out-shopping purchases are subject to Canadian taxes when the purchaser cross the border to bring them into Candian.

其他三个都排除了。当时我是把A也排除了的，因为觉得A想得太多，有段外推理之嫌。虽然E的理由也不怎么充分。可答案偏偏就是A. 
到底该想多少合适啊？段外推理有没有个明确点儿的界限啊？？

taoliang

A. 趋势保持,那么Canadian social services税收就减少,政府支持不变,为了保持原有的税收额只有tax will be assessed at a higher rate

E.BE SUBJECT TO:受支配,从属的. OUT-SHOPPING 不受Canadian taxes 控制