Answer:
I think it'd be A, B, and C right?
They had kept greek n roman culture alive for a 1,000 years after the fall of the roman empire in the west. which had preserved this cultural legacy until it was taken up in the west during the renaissance.
The cotton gin, because it separated cotton seeds from rock out in which was safer, and more efficient.
The Water loom/ water frame was a large spinning machine that was powered by water to produce cotton yarn suitable for warp.
The power loom it wove thread automatically, which was quicker and really helpful.