I think the answer is A. Not completely sure though
Answer:
An author's purpose is the overall main idea or central idea on why the author wrote the article or essay.
Explanation:
If you are asking for the author's purpose in the passage you have included then the author's purpose is to provide information to the reader about the history of the woolly mammoth and the discovery of Kostia and Edik's of the first mammoth.
Well there is best friends,close friends, good friends, bad friends, weird friends, cool friends, mean friends and so on and so forth. But there is the friend that is closer than you own family, that's the best one. But i don't know what you are looking for. ._.
Now we are engaged in a great civil war, testing whether that nation . . . can long endure. We are met on a great battlefield of that war.