大全987-78 谁能解释一下句意啊？

1.        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（D）

(E) Devoted to local history or various ethnic groups, dozens of New York’s small museums and also

麻烦哪位能解释一下这句话什么意思？因为我不明白什么意思，所以不理解从哪儿判断要用and there are

also...这种并列还有点递进的联结词，很茫然

NY除了有很多小型的museums(專門展示地方史或少數民族的),也有很多其他只展示某種主題(one-of-a-kind)的museums.

one-of-a-kind 相對於 one-of-all-kind; 所以,這要選相同方向的,不是相對的.