请问这道题A选项和C选项如何判断是错的

NO.PZ2016010801000105问题如下Last year, the nominexchange rate for CAUSw1.40. This year, the reexchange rate hcrease2%. Whiof the following statement is most likely correct?A.One US llcexchange for more th1.4 Cana llars.B.There is a crease of 2% in purchasing power of USrelative to CAC.Inflation in Cana is about 2% lower ththin USA.B is correct. The reexchange rate is to assess changes in the relative purchasing power of one currencomparewith another. The 2% crease in reexchange rate incates the 2% preciation of UScompareto CA 考点实际汇率解析实际汇率是用来评估一种货币相对于另一种货币的相对购买力的变化。实际汇率下降2%表明美元对加元贬值2%。所以B正确。此时1单位美元换汇的加拿大的数目就少于1.4单位，A不正确。C的说法不一定，所以也不入选。无法联系CPI的知识

NO.PZ2016010801000105 问题如下 Last year, the nominexchange rate for CAUSw1.40. This year, the reexchange rate hcrease2%. Whiof the following statement is most likely correct? A.One US llcexchange for more th1.4 Cana llars. B.There is a crease of 2% in purchasing power of USrelative to CA C.Inflation in Cana is about 2% lower ththin US B is correct. The reexchange rate is to assess changes in the relative purchasing power of one currencomparewith another. The 2% crease in reexchange rate incates the 2% preciation of UScompareto CA 考点实际汇率解析实际汇率是用来评估一种货币相对于另一种货币的相对购买力的变化。实际汇率下降2%表明美元对加元贬值2%。所以B正确。此时1单位美元换汇的加拿大的数目就少于1.4单位，A不正确。C的说法不一定，所以也不入选。 如题

NO.PZ2016010801000105 问题如下 Last year, the nominexchange rate for CAUSw1.40. This year, the reexchange rate hcrease2%. Whiof the following statement is most likely correct? A.One US llcexchange for more th1.4 Cana llars. B.There is a crease of 2% in purchasing power of USrelative to CA C.Inflation in Cana is about 2% lower ththin US B is correct. The reexchange rate is to assess changes in the relative purchasing power of one currencomparewith another. The 2% crease in reexchange rate incates the 2% preciation of UScompareto CA 考点实际汇率解析实际汇率是用来评估一种货币相对于另一种货币的相对购买力的变化。实际汇率下降2%表明美元对加元贬值2%。所以B正确。此时1单位美元换汇的加拿大的数目就少于1.4单位，A不正确。C的说法不一定，所以也不入选。 老师好，C如果改成higher th应该也是对的吧？

NO.PZ2016010801000105 问题如下 Last year, the nominexchange rate for CAUSw1.40. This year, the reexchange rate hcrease2%. Whiof the following statement is most likely correct? A.One US llcexchange for more th1.4 Cana llars. B.There is a crease of 2% in purchasing power of USrelative to CA C.Inflation in Cana is about 2% lower ththin US B is correct. The reexchange rate is to assess changes in the relative purchasing power of one currencomparewith another. The 2% crease in reexchange rate incates the 2% preciation of UScompareto CA 考点实际汇率解析实际汇率是用来评估一种货币相对于另一种货币的相对购买力的变化。实际汇率下降2%表明美元对加元贬值2%。所以B正确。此时1单位美元换汇的加拿大的数目就少于1.4单位，A不正确。C的说法不一定，所以也不入选。 reexchange rate=nominexchange rate*(US CPI/CCPI)这里只给出了前一年的nominexchange rate=1.40，以及第二年的reexchange rate相对于第一年的降低了2%所以我们得不到下一年的nominexchange rate的信息，A错误货币购买力是本国货币的价值（反映在nominexchange rate上）被本国的物价（反映在CPI上）归一化，故reexchange rate反映的就是货币的相对购买力，B正确C与A同理，完全没有得到任何信息

NO.PZ2016010801000105 问题如下 Last year, the nominexchange rate for CAUSw1.40. This year, the reexchange rate hcrease2%. Whiof the following statement is most likely correct? A.One US llcexchange for more th1.4 Cana llars. B.There is a crease of 2% in purchasing power of USrelative to CA C.Inflation in Cana is about 2% lower ththin US B is correct. The reexchange rate is to assess changes in the relative purchasing power of one currencomparewith another. The 2% crease in reexchange rate incates the 2% preciation of UScompareto CA 考点实际汇率解析实际汇率是用来评估一种货币相对于另一种货币的相对购买力的变化。实际汇率下降2%表明美元对加元贬值2%。所以B正确。此时1单位美元换汇的加拿大的数目就少于1.4单位，A不正确。C的说法不一定，所以也不入选。 因为题目没说是直接还是间接标价法啊，我咋判断是谁贬值了呢。。。。谢谢老师