Jan Matzeliger invented the shoe-producing machine that could finish from 100-650 more shoes (each day) than by hand. This made shoe production a factory (rather than hand-made) product.
The answer is public and private assistance from the United States and other nations. The Green Revolution alludes to an arrangement of research and the improvement of innovation exchange activities happening between the 1930s and the late 1960s (with prequels in crafted by the agrarian geneticist Nazareno Strampelli in the 1930s), that expanded rural creation around the world, especially in the creating scene, starting most particularly in the late 1960s.
It could be A or C, i'm not too sure
I’m pretty sure it’s unskilled immigrants :))
