Answer:
C. The colonists are violent.
Explanation:
Keep in mind that I haven't read <em>Heart of Darkness, </em>but I'm certain this is the answer. However, take it with a pinch of salt.
you should start it with an opinion. for example : Romeo and Juliet was the most tragic love story in history. (or if you disagree) Romeo and Juliet was the most simpleminded story ever! after that you should use some evidents to back up your claim. basic reasons why you think what you think. I hope i helped <3 (writing is sumthin dats simple for me lemme kno if u need anymore help)