How is internet access provided to a WAN edge router that is connected to a MPLS transport link?

How is internet access provided to a WAN edge router that is connected to a MPLS transport link?
A . OMP advertises a default route from a WAN Edge router that is connected to the MPLS and internet transport networks
B . Internet access must be provided at the WAN Edge router through either a 4G/5G link or local Internet circuit
C . An extranet must be provided in the MPLS transport network to allow private traffic to reach the public internet
D . TLOC extensions are used to route traffic to a WAN Edge router that is connected to the Internet transport network

Answer: D