一道语法题 求解

sassyangel913

At the time of the Mexican agrarian revolution, the most radical faction, that of Zapata and his followers, proposed a return to communal ownership of land, to what had been a pre-Columbian form of ownership respected by the Spaniards.    （A）
(A) land, to what had been a pre-Columbian form of ownership respected by the Spaniards
(B) land, a form of ownership of the pre-Columbians and respected by the Spaniards
(C) land, respected by the Spaniards and a pre-Columbian form of ownership
(D) land in which a pre-Columbian form of ownership was respected by the Spaniards
(E) land that had been a pre-Columbian form of ownership respected by the Spaniards
这个题就更纠结了，我看过许多都说是因为bcde存在修饰错误的问题，但是我想问，如果后面接定语从句，修饰的是中心词还是整个词，比如说，题中的communal ownership of land 后面接B选项的同位语从句，D选项的非限制性定语从句， E选项的限制性定语从句 都是修饰land？为什么不是整个communal ownership of land？