I think the answer is B but it's been a while after all I'm in high school now so yea lol but its B
He established a responsible government. He got rid of corrupt and no good administrators. He also changed the system of provincial administration so that all provincial governors were answerable to him!
I hope this helps !
In Germany, the power is with the people (=it's a democracy) which are represented by the members of the parliament: it's a representative democracy. It's also a federation of 16 states.
Iran, on the other hand is a theocracy: a country ruled by the members of the clergy. It can also be named an oligarchy: the power is with a few members of the society.