What Is the Evidence That the Social Classes Were Becoming

What is the evidence that the social classes were becoming increasingly differentiated during the Shang Dynasty?

A) The various clans were ranked by wealth and status.
B) There was a sharp rise in the number of enslaved people.
C) Poorer people were unable to own their own farms and instead worked for others.
D) An emerging middle class became the primary landowners.
E) The aristocracy hired substitutes to take their place in battles.