In an unmanaged CE router implementation, how does the service provider enforce the SLA?

A.
by using class-based policing on the CE to PE link to limit the customer’s input rate

B.
by marking on the CE to PE link and using CBWFQ and CB-WRED on the PE to P link

C.
by marking on the CE to PE link and using class-based policing on the PE to P link

D.
by using class-based random discard on the CE to PE link to limit the customer’s input rate

Explanation:

In an unmanaged Router Implementation, Service provider can enforce SLA By using class based policy on the CE to PE link to limit the customer’s input rate.