What is a difference between signature-based and behavior-based detection?

A.	Signature-based identifies behaviors that may be linked to attacks, while behavior-based has a predefined set of rules to match before an alert.
B.	Behavior-based identifies behaviors that may be linked to attacks, while signature-based has a predefined set of rules to match before an alert.
C.	Behavior-based uses a known vulnerability database, while signature-based intelligently summarizes existing data.
D.	Signature-based uses a known vulnerability database, while behavior-based intelligently summarizes existing data.