Which statement describes the QoS behavior between P and PE routers of an MPLS provider network for an L3VPN service?

Which statement describes the QoS behavior between P and PE routers of an MPLS provider
network for an L3VPN service?

A.
The PE function honors DSCP markings set by the CE.

B.
The customer and provider must agree on DSCP classification and traffic priorities.

C.
Classification of customer traffic is handled by the P router.

D.
The PE function cannot map DSCP markings to MPLS EXP bits.