The correct answer B. To maintain a balance of power among European nations.
Step-by-step explanation
Imperialism was a trend of domination of the European nations during the Industrial Revolution until the middle of the 20th century in which they built vast territorial and economic empires around the world. An example of this is the numerous European colonies that existed on all continents, for example, England had colonies in North America, part of India, China, Oceania, and southern Africa. This practice of domination was given thanks to alliances between European countries to maintain and distribute the territory they were conquering. Therefore, the correct answer is B. To maintain a balance of power among European nations.