Given the scheduler-policy (below), how much bandwidth can the best-effort traffic receive (PIR and CIR) when the ingress rate of each queue is 10Mbps?

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Given the scheduler-policy (below), how much bandwidth can the best-effort traffic receive (PIR and CIR) when the ingress rate of each queue is 10Mbps?
A . PIR = 4Mbps. CIR = 1Mbps
B . PIR = 1Mbps, CIR = 1 Mbps
C . PIR = 10Mbps, CIR = 1Mbps
D . PIR = 5Mbps, CIR = 1.25Mbps
E . PIR = 1.25Mbps, CIR = 1.25Mbps

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Answer: B