Which of the following would best describe secondary evidence? 

Answer options:

A. Oral testimony by a non-expert witness
B. Oral testimony by an expert witness
C. A copy of a piece of evidence
D. Evidence that proves a specific act

C

Secondary evidence is defined as a copy of evidence or oral description of its contents. It is considered not as reliable as best evidence. Evidence that proves or disproves a specific act through oral testimony based on information gathered through he witness`s five senses is considered direct evidence. The fact that testimony is given by an expert only affects the witness`s ability to offer an opinion instead of only testifying of the facts. Source: KRUTZ, Ronald L. & VINES, Russel
D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 9: Law, Investigation, and Ethics (page 310).