The idea of interchangeable parts, which was an important aspect of th

The idea of interchangeable parts, which was an important aspect of the American System of Manufacturing, is attributed by Hughes and Cain (2011) to

(a) Henry Ford, who used it in the production of automobiles.
(b) Adam Smith, who suggested it in his book The Wealth of Nations.
(c) Thomas Jefferson, who used it in his “nailery” on his plantation.
(d) Eli Whitney, who used it in the production of guns.

ANSWER

(d)