Which of the following does Conrad to use as a metaphor for imperialism?

A. It is a man of war inexplicably "firing into a continent"

B. It is "a flabby, pretending, weak-eyed devil of a rapacious and pitiless folly"

C. It is a "black shadow of disease and starvation, lying confusedly in the greenish gloom"

D. It is a "miracle" because it looks good in the midst of the hot, sticky, sweaty hungry