The sentence finishes by using a string of "wh-" noun clauses. These clauses will not be concerns, so the final a person also needs to not be a matter. "Which 1 will be the best" is obviously a question structure, so it makes sense that " The dangers associated with https://share.evernote.com/note/a8fd1cb2-5733-5366-f5df-7a36578ae666