Annual Loss Expectancy (ALE) quantifies a risk event's expected financial impact and is derived from Single Loss Expectancy (SLE) × Annualized Rate of Occurrence (ARO). CRISC guidance states: "A well-defined risk event includes quantified impact analysis such as annual loss expectancy to facilitate prioritization and comparison." Chain-of-custody and KPIs are unrelated to defining risk events. Hence, B is correct. CRISC Reference: Domain 2 - IT Risk Assessment, Topic: Risk Quantification and Impact Analysis.