Which of the following is the MOST likely reason why e-mail systems have become a useful source of evidence
for litigation?

A.
Multiple cycles of backup files remain available.

B.
Access controls establish accountability for e-mail activity.

C.
Data classification regulates what information should be communicated via e-mail.

D.
Within the enterprise, a clear policy for using e-mail ensures that evidence is available.

Explanation:
Backup files containing documents that supposedly have been deleted could be recovered from these files.
Access controls may help establish accountability for the issuance of a particular document, but this does not
provide evidence of the e-mail. Data classification standards may be in place with regards to what should be
communicated via e-mail, but the creation of the policy does not provide the information required for litigation
purposes.