[/u]Degler does more than merely summarizing[/u] 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) Deglerâ€™s study is more than a mere summarizing of
(C) Degler has done more than a mere summarizing of
(D) Deglerâ€™s study has done more than summarize merely
(E) Degler does more than merely summarize
Please explain the grammar rule. OA is convincing but I am afraid I will make the same mistake again if presented with a similar question at some other time. Depending on one's ear is risky because we are not always surrounded by perfect english speakers yo