Which Two Items Are True About QoS in MPLS VPN

Multiple Choice

Which two items are true about QoS in MPLS VPN (RFC 2547bis) networks? (Choose two.)

A) On egress from the Edge-LSR, the EXP field is used for PHB QoS towards the CE.
B) MPLS can force packets into specific paths and bandwidths based on Edge-LSR mapping of DSCP to EXP.
C) DiffServ information must be made known to the LSR in the MPLS header using the EXP field.
D) MPLS QoS is a scalable and simple solution because it only requires application at the Edge-LSR.