B

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 landin9．chances ale 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。