made manufacturing more efficient because identical pieces could be assembled quickly by unskilled workers.

Factories could hire unskilled laborers at lower wages. What are some advantages to interchangeable parts? They allowed parts to be replaced easily, they could be assembled quickly by unskilled workers, they made manufacturing more efficient, and they made goods cheaper.

Explanation:

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in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate