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-services tax that pays for Canadian social services 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 Canadian goods-and-services tax will be assessed at a higher rate. （B）If Canada imposes a substantial tariff on the goods bought across the border， a reciprocal tariff on cross-border shopping in the other direction will be imposed， thereby harming Canadian businesses. （C）The amounts the Canadian government pays out to those who provide social services to Canadians are increasing. （D）The same brands of goods are available to Canadian shoppers across the border as are available in Canada. （E）Out-shopping purchases are subject to Canadian taxes when the purchaser crosses the border to bring them into Canada. 答案选a 这题应为结论题，逻辑链为加拿大人境外购物，因为境外购物减少了social services 的tax，为什么能推出境外购物继续并且social service费用不变就一定会导致service tax上升哪？题干中没有这样的逻辑链，如果政府补贴就不会上升了 | 
