Which of the following would NOT be a sufficient basis for admitting the letter into evidence?
Opinion testimony of a nonexpert witness based upon familiarity acquired in order to authenticate the signature.
Evidence that the letter was written in response to one written by Parker to Dix.
Testimony by Parker that she is familiar with Dix's signature and recognizes it on the letter.
Comparison by the trier of fact of the letter with an admitted signature of Dix.