再问gwd-23-2, 虽然讨论过，但不明白为何C不行

 GWD-23-Q2

Known today by a name they would not have recognized—Anasazi, Navajo for “ancient enemies”—the ancestors of the modern Zuni and Hopi built and then, for reasons still mysterious, abandoned the complex roads and structures of the domain they ruled a millennium ago in the American southwest.

A.      ancestors of the modern Zuni and Hopi built and then, for reasons still mysterious, abandoned the complex roads and structures of the domain they ruled a millennium ago in the American southwest

B.      reasons are still mysterious why the ancestors of the modern Zuni and Hopi built and then abandoned the complex roads and structures of the domain they ruled in the American southwest a millennium ago

C.      modern Zuni and Hopi had ancestors who, a millennium ago, ruled a domain in the American southwest where they built and then abandoned complex roads and structures for still mysterious reasons

D.      domain of the American southwest was ruled a millennium ago by the ancestors of the modern Zuni and Hopi, who built and then, for reasons still mysterious, abandoned complex roads and structures

E.       complex roads and structures of the domain that the ancestors of the modern Zuni and Hopi ruled a millennium ago in the American southwest were built and then, for reasons still mysterious, abandoned

key is A, why not C, what's the difference??

1，从逻辑主语考虑，Anasazi  是指the ancestors，而不是modern Zuni and Hopi阿。

2，可不可以从句子的从属关系考虑，C的主句变成modern Zuni and Hopi had ancestors，而who后面的定语从句才是作者要表达的重点吧，表达的重点都搞成一个长长的定语从句做修饰成分，这样感觉怪怪的。