The correct option is
B Domineer
'Lord it over' means to behave as if you are more important than someone and have a right to tell that person what to do. Option C is the most suitable answer as it is closest in meaning to that of the given phrase. 'Domineer' means to control other people without thinking about their feelings or to assert one's will over another in an arrogant way.
Options A, C, D and E are incorrect because 'to predominate' means to be the largest in number or the most important, 'to prevaricate' means to speak or act in an evasive way, 'to fabricate' means to invent (something) in order to deceive and 'to concoct' means to make something, usually food, by adding several different parts together.