Akey difference between the greek city-states and the city-states of mesopotamia, or the city-states of mesoamerica, was that
a. most of the greek city-states developed direct democracies
b. many of the greek city-states were under the collective rule of local nobles
c. many of the greek city-states allowed some freedoms for women
d. most of the greek city-states were ruled by cruel leaders called tyrants