The passage justifies European imperialism in Africa by arguing that even the less advanced and primitive tribes can benefit from the industrial mission brought by European imperialism. It suggests that the introduction of new technologies and techniques, such as mechanical and artisan work, carpentry, blacksmithing, agriculture, sinking of wells, irrigation, planting of useful trees, and use of domestic animals for agricultural purposes can render the native land more productive. Therefore, option C, "European imperialists brought new technologies to Africa," is the correct answer. The passage argues that European imperialism and the industrial mission it brought can have a positive impact on Africa and its people, and can contribute to the development of the region. This argument was often used by European imperialists to justify their expansion into Africa, as they believed that they were bringing civilization, progress, and development to a region they saw as primitive and backward.