Answer:
A. The colonists are cruel to the Africans.
Explanation:
Option A is correct. The theme of colonialists’ cruelty resonates throughout the novel. Mr. Kurtz shows no mercy in killing the Africans to plunder the resources. Natives' heads are erected on the poles where Mr. Kurtz is staying. At one point Mr. Kurtz says “Exterminate all brutes,”
Option B is not correct because it is just one result of many reasons, and is least important because it is colonialists’ decision to be there and face the dangers there. They are not invited by Africans to help them.
Option C is not correct. Although this does describe the situation, yet this is not the major theme of the novel.
Option D is not correct because there is hardly any mention of this concept in the novel.
