题目内容：
Pushbike PerilLow speed bicycle crashes can badly injure--or even kill--children if they fall onto the ends of the handlebars(自行车把)．______ (1)
Kristy Arbogagt, a bioengineer ( 生物工程师) at the Children’ s Hospital of Philadelphia in Pennsylvania, began the project with her colleagues after a study of serious abdominal(腹部的)injuries in children in the past 30 years showed that more than a third were caused by bicycle accidents．_____(2)
By interviewing the children and their parents, Kristy and her team were able to reconstruct many of the accidents and identified a common mechanism responsible for seriousinjuries．_____ (3) To maintain their balance they turn the handlebars through 90 degrees,but their momentum(动力)forces them into the end of the handlebars．______ (4)
The solution the group came up with is a handgrip(握柄) fitted with a spring and damping(缓冲的)system．The spring absorbs up to 50 per cent of the forces transmittedthrough the handlebars in an impact．_____ (5) “But our task has been one of educationbecause up until now, bicycle manufacturers were unaware of the problem,” says Kristy．
The team has also approached the U．S．Consumer Product Safety Commission to tryto persuade manufacturers to adopt the new design．A decision is expected later this year．
A．The task, according to Kristy, was to identify how the injuries occurred and to come up with some countermeasures(对策)．
B．The group hopes to commercialize(使商业化)the device, which should add only a few dollars to the cost of a bike．
C．So a team of engineers is redesigning(重新设计)the humble handlebar in a bid to make it safer．
D．When the task is over, the engineers believe, there are probably no such injuries
or tragedies among bicycle-drivers．
E．The bike then falls over and the other end of the handlebars hits the ground, ramming it into their abdomen．
F They, discovered that most injuries occur when children hit an obstacle at a slow speed, causing them to t,opple over．
请选择（1）处的最佳答案．
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