An over generalization is made about teenagers; just because someone is one doesn't mean that they're a liar
Question 2)
C is the only sentence that is gramatically correct ( A) you can't say most finest, B) more finest doesn't make sense, D) the finer isn't a comparison)
Question 3)
An anonymous website isn't credible, neither is an opinion from your friend, and an article from Tokyo is too small of a region.
Independent clause consist of the subject and a verb to complete one thought e.g He ran fast while dependent clause also consist subject and verb but cannot be complete as one thought e.g When we arrive in class........