How does statistical detection differ from rule-based detection?

How does statistical detection differ from rule-based detection?
A . Statistical detection involves the evaluation of events, and rule-based detection requires an evaluated set of events to function.
B . Statistical detection defines legitimate data over time, and rule-based detection works on a predefined set of rules
C . Rule-based detection involves the evaluation of events, and statistical detection requires an evaluated set of events to function Rule-based detection defines
D . legitimate data over a period of time, and statistical detection works on a predefined set of rules

Answer: B