How were the new england textile mills planned and built?
experienced british builders traveled to the united states to advise american merchants.
new england merchants paid french and german mechanics to design factories for them.
new england merchants and british migrants memorized plans from british mills.
textile mills were a purely american creation, invented by francis cabot lowell in 1813.

New England merchants and British migrants memorized plans from British mills.

Explanation:

During the War of 1812, American merchants had to face important economic adversities. Severe economic problems forced merchants of New England, such as Francis Cabot Lowell, to focus on manufacturing. Lowell had visited English mills in his trip to Great Britain. Afterwards, he arrived to Massachusetts with a clear memory of the plans for the technolgical textile machines he had observed in such visits, particularly the power loom, which worked as a replacement for individual hand weavers. Lowell persuaded some investors to create new mill towns and in 1813, they formed the Boston Manufacturing Company.

i believe the answer is d.