With Regard to Using an Antivirus Scanner During a Computer

With Regard to using an Antivirus scanner during a computer forensics investigation, You should:

A) Scan the suspect hard drive before beginning an investigation
B) Never run a scan on your forensics workstation because it could change your systems configuration
C) Scan your forensics workstation at intervals of no more than once every five minutes during an investigation
D) Scan your Forensics workstation before beginning an investigation