Answer: D. Its leader uses political power to stifle political dissent.
Step-by-step explanation:
The government of Iran is autocratic. This means that it is under a religious leader who takes on the title of Supreme Leader of Iran. This position is not up for election and is held for life.
The Supreme Leader has at times, taken actions to ensure that Iran's conservative status are upheld. They have banned political parties and candidates who they view as capable of misleading the country from their will and they have also clamped down on protests against their rule.
It is therefore an authoritarian government.