假设进入欧盟市场之前，人们发现波兰的汽车生产成本为14000欧元，而德国是20000欧元。假设欧盟是

关税同盟区，对汽车征收X%的关税，并假设日本的汽车生产成本为Y(欧元)。在下面的条件下，评价欧盟增加从波兰进口汽车会导致贸易创造还是贸易转移？

a.X=50%，Y=10000欧元。

b.X=100%，Y=10000欧元。

c.X=100%，Y=8000欧元。

Suppose that upon entering the European Union， it is discovered that the cost of automobile production in Poland is 14，000 while it is 20，000 in Germany. Suppose that the EU， which has a customs union， has a X percent tariff on automobiles and that the costs of production are equal to Y(valued in euros) in Japan. Comment on whether the addition of Poland to the European Union would result in trade creation or trade diversion under the following scenarios：

a.X=50%and Y=10000

b.X=100%and Y =10000

c.X=100%and Y=8000