Which three Diameter AVPs are sent within the CCR-I request to the OCS?

Refer to the exhibit.

Which three Diameter AVPs are sent within the CCR-I request to the OCS? (Choose three.)

A.
Session-ID

B.
Used-Service-Unit

C.
Request-Service-Unit

D.
3GPP-Quota-Consumption-Time

E.
Subscription-ID

F.
Event-Trigger