选择题：What aids there were to lighten labor were immemor

What aids there were to lighten labor were immemorial, like the mill, which was already ancient in Chaucer’s time.
A.像磨房一样的一些旨在减轻劳动强度的古代机械，在乔叟时代就已经是古董了。
B.一些旨在减轻劳动强度的机器不知从何时代起就有了，比如磨房，在乔叟时代就已经是古董了。
C.一些旨在减轻劳动强度的古代机械，比如磨房，在乔叟时代就已经是古董了。
D.像磨房一样的一些在乔叟时代就已经用了很久的机器，旨在减轻劳动强度，不知从何时代起就有了。