Unlike the automobile company, whose research was based on crashes involving sport utility vehicles, the research conducted by the insurance company took into account such factors as a driver’s age, sex, and previous driving record.
company, whose research was based on
company, which researched
company, in its research of
company’s research, having been based on
company’s research on
D : having been based on crashes 我觉得恰恰是修饰'research‘而不是 “company' 的。因为company can't 'base on’ crashes. 不过D 错的点在于事态不好 没有必要用have been
请老师指教:)
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