OG13scanswer.docx

9.8 Answer Explanations?The following discussion of sentence correction is intended to familiarize you with the most efficient and effective approaches to these kinds of questions. The particular questions in this chapter are generally representative of the kinds of sentence correction questions you will encounter on the GMAT exam.1. In a review of 2,000 studies of human behavior that date back to the 1940s, two Swiss?psychologists, declaring that since most of the studies had failed to control for such variables as social class and family size,?none could be taken seriously.?(A) psychologists, declaring that since most of the studies had failed to control for such variables as social class and family size,?(B) psychologists, declaring that most of the studies failed in not controlling for such variables like social class and family size, and?(C) psychologists declared that since most of the studies, having failed to control for such variables as social class and family size,?(D) psychologists declared that since most of the studies fail in controlling for such variables like social class and family size,?(E) psychologists declared that since most of the studies had failed to control for variables such as social class and family size,?Verb form; Diction?The subject of the sentence,?two Swiss psychologists,?needs a main verb. The -ing?verb form?declaring?cannot, on its own, be the main verb of a correct English sentence. Furthermore, the clause that addresses the reason for not taking the studies also seriously needs a subject (most of the studies) and a verb (had failed).?A The sentence needs a verb form that agrees in person and number with the subject?two Swiss psychologists?and that is in the appropriate tense.B In addition to the problem with?declaring, explained above, in this version of the sentence the phrase?failed in not controlling for?is awkward and does not mean the same thing as?failed to control for. Also, the expression?such X like Y?is incorrect in E