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Explanation/Reference: Explanation: For a biometric solution three main accuracy measures are used: false-rejection rate (FRR), cross-error rate (CER) and false-acceptance rate (FAR). FRR is a measure of how often valid individuals are rejected. FAR is a measure of how often invalid individuals are accepted. CER is a measure of when the false- rejection rate equals the false-acceptance rate. Choices A and B are performance measures.