Which Indicates the Most Important Reason for the Forensic Nurse

Which indicates the most important reason for the forensic nurse to maintain a proper chain of evidence?

A) Maintaining a proper chain of evidence will exonerate the perpetrator.
B) Maintaining a proper chain of evidence will assist in gathering enough data for conviction.
C) All evidence,if properly maintained,will convict the assailant.
D) Crime data maintained with a proper chain of evidence can be used in a court of law.