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) 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 what 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.

答案是A，但是不明白to what在这里面的作用是什么？B，里面的and去掉是不是也正确阿？

不定式的同位语。

B即使去掉and也不好，1)a form of owneship of the pre-Columbians没有pre-Columbian

form of ownership好;2)respected修饰form而不是pre-Columbians。