Eli Whitney introduced interchangeable parts in the manufacture of muskets. Which of these was an effect of his innovation?
A: The use of interchangeable parts encouraged the end of slavery.
B:The use of interchangeable parts was applied to other industries.
C:Whitney’s invention proved ineffective in dividing labor among unskilled workers.
D: Although using interchangeable parts enabled the mass production of identical weapons, it proved unable to lower costs in other industries
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