请教一道语法题

小新和小白9899

求解一题
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 would find a miracle

C.even if they can afford household appliances their grandparents would have 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      
C选项中为什么用would have found 的结构呢，对意思上有什么影响吗，请教各位NN，谢谢

geegee

which would have been a miracle to their grandparents
如果他们的祖父母还能跑马拉松，那是个miracle.
但是家用的设施，被看作是miracle罢了。

would have found是一个虚拟语气，虽然是祖父母级别，但有的也很懂得使用这些高级的家电，没准也在用。

powers

E除了be able to没有can好，还有什么不对的？

毛毛carina

would是表达一种可能性，不是一种实际情况