麻烦哪位能帮我GWD-13-9 为什么是B？

13--Q9:

Business Analyst: National Motors began selling the Luxora—its new model of sedan—in June. Last week, National released sales figures for the summer months of June, July, and August that showed that by the end of August only 80,000 Luxoras had been sold. Therefore, National will probably not meet its target of selling 500,000 Luxoras in the model’s first twelve months.

Which of the following would be most useful to establish in order to evaluate the analyst’s prediction?

1. Whether new-car sales are typically lower in the summer months than at any other time of the year
   
2. Whether National Motors currently produces more cars than any other automaker
   
3. Whether the Luxora is significantly more expensive than other models produced by National Motors
   
4. Whether National Motors has introduced a new model in June in any previous year
   
5. Whether National Motors will suffer serious financial losses if it fails to meet its sales goal for the Luxora

这种题，先看结论，再看支撑结论的理由．对理由进行取极端．所以选Ａ．