B. The British won by using scorched earth tactics.
Explanation:
The Boer Wars are important for several reasons. The fighting showed how effective guerilla war tactics could be. Britain had one of the most well-trained and well-funded armies but had to use scorched-earth tactics to finally win. The nation had to destroy almost everything—farms, schools, homes— to win. The war foreshadowed much of the violence that was to come. The British set up concentration camps to hold the Boers and these atrocities horrified British citizens. As a result, Britain improved its own welfare systems. The Boer Wars showed how difficult and violent it would be for Europe to control some African colonies.
The leaders of europe got together and changed the borders of various countries in hope of creating a large number of countries with relatively similar levels of power