Although Francis Cabot Lowell Illegally Made Detailed Sketches from Memory

Although Francis Cabot Lowell illegally made detailed sketches from memory of the machinery he inspected in British textile mills, he is considered to be more than an industrial spy because he __________.

A) improved on British models of machinery, which led to more efficient methods of spinning cotton
B) invented interchangeable parts that led to mass standardization of manufactured goods
C) began the precedent of hiring cheap child labor to work in textile factories
D) became the first American industrialist to use water power to operate a factory