 In a contract suit by Perez against Drake, each of the following is an accepted method of authenticating Drake's signature on a document offered by Perez EXCEPT:
A non-expert who, in preparation for trial, has familiarized himself with Drake's usual signature testifies that, in his opinion, the questioned signature is genuine.  The jury, without the assistance of an expert, compares the questioned signature with an admittedly authentic sample of Drake's handwriting.  A witness offers proof that the signature is on a document that has been in existence for at least 20 years, that was in a place where it would be if it was authentic, and that has no suspicious circumstances surrounding it  A witness testifies that Drake admitted that the signature is his.