The deliberate Evocation permitted to power through insistent rhythms and put because it sounds is known as primitivism.
I believe the word which best describes the overall scene Conrad paints of the Imperialists is C) rapacious.
That word means greedy, and this is exactly the way the Imperialists behave.
A compound meter is when beats are divided into three notes so I think the best option would be C. 6/8
Hope this helps and I hope you have a great day!
Oh nice oc! I could never make an oc like that