What do the traffic received and sent statistics present?

Refer to the exhibit.

A user logged in to the Self-Service Portal as shown.
What do the traffic received and sent statistics present?
A. the total amount of the traffic the quest transmitted, as seen through RADIUS CoA packets from the client to ClearPass
B. the total amount of traffic the guest transmitted, as seen through RADIUS accounting messages sent from the NAD to ClearPass
C. the total amount of traffic the guest transmitted, as seen through RADIUS CoA packets from the NAD to ClearPass
D. the total amount of traffic the guest transmitted after account expiration, as seen through RADIUS accounting messages sent from the NAD to ClearPass
E. the total amount of traffic the NAD transmitted to ClearPass, as seen through RADIUS accounting messages from the NAD to ClearPass.

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