新G逻辑十套里exercise1里最后一题

七虫1七花UID：2959561

exercise1最后一题
13.Excluding purchases by businesses, the average  
amount spent on a factory-new car has risen 30 per-
cent in the last five years. In the average household  
budget, the proportion spent on car purchases has  
remained unchanged in that period. Therefore the   
average household budget must have increased by   
30 percent over the last five years.

Which of the following is an assumption on which  
the argument relies？
(A)The average number of factory-new cars pur-
chased per household has remained unchanged  
over the last five years.  
(B)The average amount spent per car by businesses  
buying factory-new cars has risen 30 percent in  
the last five years.  
(C)The proportion of the average household budget  
spent on all car-related expenses has remained  
unchanged over the last five years.  
(D)The proportion of the average household budget  
spent on food and housing has remained  
unchanged over the last five years.
(E)The total amount spent nationwide on factory-
new cars has increased by 30 percent over the  
last five years.
答案盡然A   感覺錯了

七虫1七花UID：2959561

至少D要比A靠譜一點   雖然D也牽強      除非A的average number 是只取整數四捨五入的