Answer:
A
Explanation:
Eli Whitney was the person most responsible for initiating the use of interchangeable parts in manufacturing, and he first invented a machine that separated the cotton seed from the cotton fiber. He also used those parts that can be substituted ( interchangeable parts ) for the production of weapons, at a low price, with unskilled workers, which reduced greatly the prices to repair and replace parts.
It was known as the Manhattan Project
People should live proper, moral, and respectful lives.