You would check their sources, so your answer is C
No the last one is for a question, the proper punctuation would be a period.
Answer:
American essayist, poet, and practical philosopher Henry David Thoreau is renowned for having lived the doctrines of Transcendentalism as recorded in his masterwork, Walden He was also an advocate of civil liberties Explanation:
His mentor was Ralph Waldo Emerson
3rd person, because if it was first, you would be personally viewing it as a part of you, like your in it, then its not second person because that's using 'you' and again, you aren't apart of it ,so its 'they, them' which is 3rd person.<span />
