B

B【解析】文章第五段提到“…but any accident?serious enough to‘throw you clear’is also going to?be serious enough to give you a very bad landing． chances are you’ll have travelled through a?windshield or door to do it．”，其中“to do it”指的是“to have a very bad landing”。“you’ll?have travelled?through a windshield or door”指的是“你在被甩出车外重重地落地之前，必须得先穿过车窗或车门”，这样就免不了被玻璃刮伤。故选B项。