两道不能理解的题

for many people, household labor remains demanding even if able to afford household appliances their grandparents would find a miracle.
A) even if able to afford household appliances their grandparents would find a miracle
        
B) despite being able to afford household appliances their grandparents woul d find a miracle
C) even if they can afford household appliances their grandparents would hav e found miraculous
D) although they could afford household appliances their grandparents would find miraculous
E) even if they are able to afford household appliances which would have been a miracle to their grandparents

答案是C 可是C 的样子像是个虚拟语气啊，到底是怎么回事？ 根本没有理解？？？

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

答案是A，A是个什么结构啊，感觉没有见过的，而且感觉这个答案很诡异，谢谢指点哈