Final answer:
Testimony of a person who was present when a document was prepared would be admissible at trial if the document was destroyed by accident.
Step-by-step explanation:
The testimony of a person who was present when a document was prepared would be admissible at trial if the document was destroyed by accident. This is because the person's testimony can provide information about the contents of the document and its preparation process. The court would consider this testimony as evidence since the original document is no longer available due to accidental destruction.