The correct answer is C. A dominant one.
Step-by-step explanation:
Imperialism is an ideology that purposes certain countries or people are superior to others and therefore those considered as inferior need to be ruled or dominated. For example, during the 19th century, most of the African continent was colonized by European countries due to imperialism.
According to this, imperialist people or people who believe in imperialism are likely to have a dominant and arrogant attitude because they will consider certain countries, societies or people are inferior and therefore they will believe these countries, societies or people need to be dominated by a country or entity that is superior, including themselves.