A Service Provider Creates a Network Design That Runs MPLS

Multiple Choice

A service provider creates a network design that runs MPLS in its WAN backbone using OSPF as the IGP routing protocol. What would be two effects of additionally implementing MPLS-TE? (Choose two.)

A) MPLS-TE is required to reroute traffic within less than 1 second in case of a link failure inside the backbone.
B) MPLS-TE is required to route different MPLS QoS service classes through different paths.
C) MPLS-TE and OSPF cannot be used together inside one MPLS network.
D) MPLS-TE cannot use OSPF for the traffic path calculation.
E) MPLS-TE is required to create backup paths independently from the IGP.