Final answer:
The quotation that best demonstrates an imperialist ideology is option B.
Step-by-step explanation:
The quotation that best demonstrates an imperialist ideology is option B. The quote states, "We believe it is our duty to spread our superior culture and values to other lands." This quotation aligns with the concept of American exceptionalism and the idea of spreading liberty and democracy to other nations. It reflects the belief in the superiority of one's own culture and the desire to impose it on others through imperialism.