The introduction of interchangeable parts led directly to the -
A. formation of the patent system
B. creation of labor unions
C. use of mass-production techniques
D. rise of the 8-hour work day
C. use of mass-production techniques.
The introduction of interchangeable parts meant that each part of a product could be made to the same standard, allowing for more efficient and faster production. This led to the use of mass-production techniques, which allowed products to be made in large quantities at a faster pace. This revolutionized manufacturing and led to the widespread adoption of assembly line production, which is still used today.