Although dozens of New York's small museums are either devoted to local history or various ethnic groups, there are many one-of-a-kind museums from Manhattan to the Bronx that are open for exploration on summer weekends. (A) Although dozens of New York's small museums are either devoted to local history or various ethnic groups, there are (B) Although dozens of New York's small museums are devoted to local history or various ethnic groups (C) Dozens of New York's small museums are devoted to local history or various ethnic groups, but there are (D) Dozens of New York's small museums are devoted to local history or various ethnic groups, and there are also (E) Devoted to local history or various ethnic groups, dozens of New York's small museums and also 为什么答案是D? C为什么不对? 原题说 尽管dozens of museums 是XXXXX, 有许多 one-kind of museums 是XXXX. 表示转折的意思。 C不也是转折吗?