(A) Imperial - relating to an empire
(B) Imperious - assuming power or authority without justification; arrogant and domineering
(C) Adamant - refusing to be persuaded or to change one's mind
(D) Empire - a large group of states or countries under a single supreme, ruling authority
Haughty means arrogantly superior and disdainful. From the given options, option (B) matches the description of the given word. Hence, the answer is option (B).