题目选项分析

Traditionally, the most highly sought cars have been the "sports cars" and similar two-door models. Nevertheless, Zincstone Motors has chosen to eliminate the last two-door models and produce only four-door models.

Which of the following would, if true, most help to explain Zincstone Motors' strategy?

【选项】After a spate of recent additional safety requirements, the cost of frame and doors of Zincstone Motors' standard two-door models are now three times as expensive as standard four-door frame and doors.