How Did the Nobles in Sumerian Society Maintain Their Dominant

How did the nobles in Sumerian society maintain their dominant position?

A) They controlled access to the religious shrines and temples and denied religious rights to anyone who challenged their authority.
B) They possessed the land and permitted their clients to work parts of it, making the clients dependent on them.
C) They had exclusive political rights over public affairs, while the commoners were denied even the right to voice their opinions.
D) They held the right to tax all commercial transactions, gaining wealth and power over their opponents.