请教一个PREP的语法

B和D怎么比？

B有人说那个connected跳过of...去修饰前面的structure那个词，但是根据就近修饰这样解释是否合理？

The Anasazi settlements at Chaco Canyon were built on a spectacular scale with more than 75 carefully engineered structures, of up to 600 rooms each, were connected by a complex regional system of roads.
            

(A) with more than 75 carefully engineered structures, of up to 600 rooms each, were
            

(B) with more than 75 carefully engineered structures, of up to 600 rooms each,
            

(C) of more than 75 carefully engineered structures of up to 600 rooms, each that had been
            

(D) of more than 75 carefully engineered structures of up to 600 rooms and with each
            

(E) of more than 75 carefully engineered structures of up to 600 rooms each had been
            

分析我看了 但是我觉得他说的不是很有道理 理由需要再商榷

两个of...of...这里的使用是很笨拙的，而且修饰不清楚，CDE全错