GMAT Sentence Correction (SC) | Re: Biotechnology companies have invested millions of dollars...

Official Explanation

Answer E - A vertical scan reveals the three choices "into research", "for research", and "in research". The proper usage is "to invest in X", not "to invest into X" or "to invest for X". So we immediately eliminate (A), (B) and (C). The other problem is the pronoun "those". Here, "those" has no clear antecedent. Structurally, the antecedent would appear to be either "rose" or "blue