The main purpose of a Key Risk Indicator (KRI) is to provide early warning of increased risk exposure tied to specific risk scenarios. CRISC defines KRIs as: "Metrics that provide a signal of increasing risk exposure in relation to defined risk scenarios." Performance (A) is tracked via KPIs; threat measurement (C) is only one input. Hence, B. Assess the risk associated with risk scenarios is correct. CRISC Reference: Domain 4 - Risk and Control Monitoring and Reporting, Topic: Designing and Using KRIs.