Answer: His teachings, preserved in the Analects, focused on creating ethical models of family and public interaction and setting educational standards. The Zhou had essentially lost its control, and China was divided up into congeries of contending feudal states warring with one another for power and control.
Canning was unsustainable because the process back then was labor intensive; the process was still undefined, and the materials are very primitive. The cans used were corked and sealed with lead which led it to be hazardous
In time a fifth group was added to the cast system-- the untouchables is the correct answer.