[求助] 大全987的153(to what 的用法)

1.        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 which a pre-Columbian form of ownership was respected by the Spaniards（A）

(E) land that had been a pre-Columbian form of ownership respected by the Spaniards

我选的(D). 求教A的意思. 为什么D不行呢?

十分感谢

传说

to what 这里是 a return to what 的省略形式， 就是to what 这是句末做同位语的省略形式

yd_charles  thanks so much.