For this question the answer will be D.
Answer:
Nationalism
Imperialism
Militarism
Alliances
Explanation:
Imperialism is a policy or ideology of extending the rule over peoples and other countries, for extending political and economic access, power and control, often through employing hard power, especially military force, but also soft power. Wikipedia
Nationalism is an idea and movement that holds that the nation should be congruent with the state. As a movement, nationalism tends to promote the interests of a particular nation, especially with the aim of gaining and maintaining the nation's sovereignty over its homeland. Wikipedia
Militarism is the belief or the desire of a government or a people that a state should maintain a strong military capability and to use it aggressively to expand national interests and/or values. Wikipedia
An alliance is a relationship among people, groups, or states that have joined together for mutual benefit or to achieve some common purpose, whether or not explicit agreement has been worked out among them. Members of an alliance are called allies. Wikipedia
Answer:
C. Challenges of settling untamed lands.
Explanation:
