Isn't E completely changing the meaning of the sentence?
A / D) -> research based on crashes w/ spot vehicles (meaning the result was based on the subset of observations within those crashes)
E) -> research on crashes (meaning the crashes, not any other results were the focus of the sentence)
Clearly D is awkward, but shouldn't such a drastic change in meaning render option E) wrong?
A / D) -> research based on crashes w/ spot vehicles (meaning the result was based on the subset of observations within those crashes)
E) -> research on crashes (meaning the crashes, not any other results were the focus of the sentence)
Clearly D is awkward, but shouldn't such a drastic change in meaning render option E) wrong?
