As long as he remained in that office, he maintained his hegemony.

Answer: Option C

Hegemony : leadership or dominance, especially by one state or social group over others.
Predominance : the state or condition of being greater in number or amount.
Poverty : the state of being extremely poor.
Subordination : the action of subordinating or the state of being subordinate.
Chaos : complete disorder and confusion.

Antonym of Hegemony is Subordination