A credible peer-review source is from a source that isn't biased, or is not related to you. It is best to find someone who isn't one of your friends. Since they are credible, the source should be verified that they know what they are talking about as well. I hope this makes sense.
bet i gotchu gimme my points too
I think it is A or C but it might be A
Hope this helps ;)
He uses foreshadowing and creates suspense on how it is perplexing