14. Which of the following statements is true?

a. Ancient documents must be at least 30 years old to fall within the hearsay exception.

b. A document can never be authenticated by stipulation of the parties.

c. The "best evidence" rule prohibits a non-original document from being admitted during a trial.

d. As long as the proponent of a document offers sufficient preliminary evidence that the document is authentic, the trier-of-fact is given the opportunity to decide whether the document is what the proponent says it is.