The correct option is B.
The source of information, that would offer the most reliable fact-based information about the author is a book, that is written by the author himself. This type of source is called primary source. Information obtained from Wikipedia, movie and books published by other authors can only offer secondary information, which are not as reliable as information from primary source.
part B and part a
I think because he also saw that back people give it a big čule or hint it's part a or part b
an analytical essay is sometimes called an expository essay
I think that it's
B. alliteration
because with alliteration it means you can describe what you hear