语法题的困惑 求牛牛们帮帮忙！！谢谢大家了

joanna5200

这里有道白勇上的语法题 想请教一下大家，麻烦牛牛们帮忙看一看
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 form Manhattan to the Bronx that are open for exploration on summer weekends.
正确选项是: Dozens of New York's small museums are devoted to local history or various ethnic groups, and there are also.
如果改成正确选项这个句子的话， 就是由原句的although引导的让步状语从句变成了平行结构的主句了吗？？？这样不就是改变了原句的关系了吗？？为什么这样还是正确的呢？？谢谢大家了！！我是新手~不是很懂！烦请大家帮帮忙！

kiwifoodtown

因为原句是病句，前后句是并列关系，但却用了although这种转折的结构，所以要改过来。