We don't have the excerpt, so we cannot really answer your question.
I can help you a bit, however, so if you've read the story, you will know how to answer it yourself.
A flat character is the one who doesn't change at all over the course of a novel, whereas a round character develops and changes his or her characteristics.
A protagonist is the hero of a novel, whereas an antagonist is his "enemy."
They were better off. Without the discovery of the uses of fire, mankind would not be here. Fire led to the rapid increase of newer, more advanced tech, such as a sword instead of a club.
D. because it said between a blurred sagacity which means unleaded judgment.
It's got to be C because none of the others relate to collaboration, but I'd say if you were unsure about this answer then the only other sensible one could be B, but I'd go with C.
The statement "The inhabitants of the United States have...properly speaking, no literature." is inaccurate. Literature may work through grammar syntax and semantics but there is no existing standards that would make a piece of work qualify as literature. There is only different levels and complexity but no absolute requirement.
