It helps convey the tone by stating that the Hutu's saw the Tutsis as below them, and therefore taking their lives would be equivalent to taking the life of an animal, as many hunters do for sport. Basically, they are comparing the Tutsi people to animals and saying that their lives are less valuable.
Obama was the former president of the United States Of America (USA)
I personally think it is C however it would be better if I had a passage to go off of