题目选项分析

Save-a-Tot Corporation is a manufacturer of safety seats for bicycles and automobiles. Children often die unnecessarily in collisions because they were not properly fastened into seats that conform to their fragile bodies. Save-a-Tot has recently designed a new type of safety seat that is able to conform more closely than ever to curves in the spines and necks of small children. This new design also cushions the head in a better way. Save-a-Tot claims that the usage of these safety seats will decrease child mortality rates in serious collisions by up to 60 percent.

Which of the following, if true, represents the strongest challenge to Save-a-Tot's claim?

【选项】The proposed child safety seats will add too much weight to bicycles.