The correct answer is (C) dominion; overlordship; the position or authority of a suzerain. The exercise of control by a feudal overlord, sovereign, or a state over another independent or semi-independent state.

Suzerainty comes from Middle English suserenete (suseren [suzerain] + ete [ity])

Examples of use:

• The church sought to advance the Pope's claim to a spiritual suzerainty.
• The colony had self-government subject to the suzerainty of Her Majesty.