Answer: For all the good that staple crops bring to civilisation, it’s no secret that they’re a little bland. The pursuit of flavoursome and aromatic spices has shaped the map of the world as long as humans have craved flavour, opening up trade routes, creating opportunities for cultural exchange as well as heating up competition between empires.
Explanation:
They created tons of things, the one you are asking for would be the assembly line.
Answer:
D, demonstrating American strength to the world.