C. the qualifications of the author
Post traumatic would be a disorder that includes flashbacks.
Generalized anxiety disorder would be experiencing frequent and intense fear.
Obsessive-compulsive is an extreme fear of a specific object or situation such as, you see one book with the pages facing outward and the rest have their spine showing.
True- Because there's a thing called "Stranger Danger" because if you think you know the person, but you really don't. People lie online all the time, regarding there age and past things. =) Hoped this helped