单选题：What are researchers interested in doing as the road acciden

题目分类：理工类
题目类型：单选题
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题目内容：

What are researchers interested in doing as the road accidents worldwide increase to a shocking rate? A．They are developing faster electric vehicles.
B．They are analyzing road deaths occurring worldwide every year.
C．They focus their research on safety and new fuels.
D．They are designing fully automatic cars.

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