SAT US History Practice Question

The Bessemer process, which was important in the industrial growth of the United States in the second half of the 19th century, involved

1. A.using time-and-motion studies to streamline production and eliminate inefficiencies.
2. B.moving a product from worker to worker by a conveyor belt as it is being manufactured.
3. C.injecting air into molten iron to remove carbon and produce steel inexpensively.
4. D.connecting the various sites of an operation by telegraph wires to facilitate communication.
5. E.mass-producing interchangeable parts to decrease dependence on skilled craftspeople.