题目选项分析

To improve its chance of winning the Monaco Grand Prix, Porsche needs to improve the acceleration on its cars. It can achieve the same by installing higher quality turbo chargers on its engines, thereby boosting their power output or by reducing weight of the car by rebuilding the chassis using carbon fiber instead of aluminum. Since reducing weight is estimated to improve the acceleration more than boosting engine power would, Porsche would be doing the most it can to improve acceleration if it decided to rebuild the chassis.

What is the assumption that the author makes while drawing his conclusion?

【选项】Mercedes, winner of last year's Monaco Grand Prix, has not reported opting for improved Turbo chargers this year over reduing weight.