The correct answer is: A. Manufacturing goods with interchangeable parts
Manufacturing goods with interchangeable parts was made possible after Eli Whitney envisioned an entire system for transforming a craft performed by skilled artisans into a process performed by unskilled workers. This means each worker would do just one thing.
The Agricultural Revolution is the name given to the drastic changes in the farming process that occurred in the 1600's onwards. The spread-out, shared farms, common under the "open-field system" of cultivation, turned into more compact, but larger, farms. The many problems associated with open fields; the overgrazing of animals, difficulty in reaching consensus for change, and single herds that had led to a spread of animal diseases and uncontrollable breeding breeding; had all become generally solved (Gernhard). Farmers had discovered a crop rotation system that allowed them to forgo leaving up to half the land unused or fallow between each planting.
They always had small pox
