By default, how do Outbreak filters avoid quarantining false positives?

[answerhappygod]

By default, how do Outbreak filters avoid quarantining false positives?

A. False positives do not occur as the Anti-Virus engine will check the signature against the incoming mail. Only positive matches against the signature are quarantined for checking later on.
B. False positives are released as updates provide a better description of suspected attachment.
C. Positive matches are not quarantined. They are dropped.
D. All false positives must be quarantined until a Virus signature is received so that they can be checked.