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Unlike the automobile company, whose research was based on crashes involving sports utility vehicles, the research conducted by the insurance company took into account such factors as a driver's age, GMAT, and previous driving record.
A) company, whose research was based on
B) company, which researched
C) company, in its research of
D) company's research, having been based on
E) company's research on
Source : Official Guide
A) company, whose research was based on
B) company, which researched
C) company, in its research of
D) company's research, having been based on
E) company's research on
Source : Official Guide

















