Which four of these statements are restrictions for Frame Relay PVC bundles with QoS support for IP and MPLS？ （）
A PVC bundle will not come up unless all the precedence， DSCP， and EXP levels are configured in thebundle.
B. A PVC bundle can perform precedence and DSCP matching at the same time
C. A PVC bundle may contain no more than sixteen PVCs
D. A PVC can be in only one PVC bundle
E. A PVC bundle cannot perform precedence and DSCP matching at the same time.
F. A PVC bundle may contain no more than eight PVCs.
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