List the social status of mesopotamian, from highest rank to lowest.
a,) rulers, freeman, dependents, slaves
b.)rulers, dependents, freeman, slaves
c.)freeman, rulers, slaves, dependents
d.)dependents, freeman, slaves, rulers

A. Is probably the correct answer.

If you look at the names, they work as a giveaway. 
Rulers are made, well, to rule
Freemen sound like they aren't dependent on anyone
Dependents sound like they depend on people for social status
Slaves don't have any social rights.