18. In a contract case, the plaintiff offered a purportedly signed original of the contract, bearing the defendant's signature. The trial judge can admit it

A. Subject to the introduction of evidence that would support a finding of the genuineness of the signature

B. Only if, in the trial judge's opinion, the contested signature bears a reasonable resemblance to that of the defendant

C. Only if the trial judge finds that the genuineness of the defendant's signature is established as a matter of law

D. Only if the plaintiff persuades the court that it is more likely than not that the signature is genuine

E. None of the above