Answer:
The correct answer is A: capitalism.
Step-by-step explanation:
In his book, Imperialism, the Highest Stage of Capitalism , Vladimir Lenin describes how capitalism was used in order to create war and ensure bigger imperialist profits. He stated that Capitalism caused the division of the world among undeveloped countries and great powers.
According to Lenin, Capitalism was used as the main weapon to sustain colonialism and exploit people and finance capital.