Which of the following is NOT true about the production of Ford's Model T?

A) He implemented a system where each Model T was manufactured by hand, and only by the smartest engineers in the world, who knew every step of the car building process.
B) He implemented interchangeable parts, making construction and repairs of the Model T much easier.
C) He implemented the assembly line, giving each worker one specific task.
D) He implemented the 8 hour work day, giving each worker fewer hours to work, but allowed for his factory to run on 3 shifts, 24 hours a day.