What is the difference between the rule-based detection when compared to behavioral detection?

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What is the difference between the rule-based detection when compared to behavioral detection?

A. Rule-Based detection is searching for patterns linked to specific types of attacks, while behavioral is identifying per signature.
B. Rule-Based systems have established patterns that do not change with new data, while behavioral changes.
C. Behavioral systems are predefined patterns from hundreds of users, while Rule-Based only flags potentially abnormal patterns using signatures.
D. Behavioral systems find sequences that match a particular attack signature, while Rule-Based identifies potential attacks.