236.Degler does more than merely summarizing existing research; he constructs a coherent picture of two centuries of studies dealing with the changing roles of women. (A) Degler does more than merely summarizing (B) Degler’s study is more than a mere summarizing of (C) Degler has done more than a mere summarizing of (D) Degler’s study has done more than summarize merely (E) Degler does more than merely summarize
1, don't forget ETS' favorite principle: Parallelism. 2, a verb is superior to a noun, which is preferable to a gerund. 3, 'summarize' has noun form, which is 'summarization'. try not to use 'summarizing'