The correct option is D Output per worker increased as a result of new inventions.
The late eighteenth century was marked by a boom in cotton production. Britain was importing 2.5 million pounds of raw cotton to feed its cotton industry in 1760. Disentangling, twisting, spinning and rolling was made more efficient due to a series of inventions in the eighteenth century. These inventions increased the output per worker. They also made it possible to make stronger threads and yarn.