As civilizations developed, there were many new changes to the way people lived. one example of a change to the way people lived was a division of labor. which of the following best explains the cause of civilizations being able to develop a division of labor?
a.
development of written languages led to better education.
b.
populations grew in size, and new jobs had to be created.
c.
improved agricultural techniques led to food surpluses.
d.
territory expanded, and people were needed to join the army.