Main arguments for imperialism

Development as an excuse for imperialism.

Explanation:

Proponents of imperialism sought to justify their imperialist aspirations. Developed and powerful countries have always carried out imperialism over those who have not reached that development stage. Imperialism has always aimed to enrich itself at the expense of others. Yet to defend their aspirations, the imperialists have always pointed out that their main aim is to contribute to these underdeveloped countries' development. The construction of the infrastructure was a cover for that. Still, the real goal of constructing the infrastructure was to make it easier to transport exploited raw materials from third countries.

c) troops march forward in close formation against newer, more accurate weapons