A security administrator is called to troubleshoot a computer infection. The computer’s software correctly identified the malware and flagged it to the central
management console; however the malicious payload was still executed. Which of the following can cause this scenario?

A.
The payload hash did not match known malware

B.
The antivirus is running an older virus definition

C.
The computer is running an IDS

D.
The payload is a zero-day attack