What are the two AToM interworking modes?

What are the two AToM interworking modes? (Choose two.)

A.
bridged (interworking ethernet)

B.
routed (interworking ip)

C.
label-switched (interworking mpls)

D.
transparent (interworking transparent)

Explanation:
http://www.cisco.com/en/US/docs/ios/ios_xe/mpls/configuration/guide/mp_l2vpn_intrntwkg_xe.htm
l
Interworking is a transforming function that is required to interconnect two heterogeneous
attachment circuits (ACs). Several types of interworking functions exist. The function that is used
would depend on the type of ACs being used, the type of data being carried, and the level of

functionality required. The two main Layer 2 Virtual Private Network (L2VPN) interworking
functions supported in Cisco IOS XE software are bridged and routed interworking.
Layer 2 (L2) transport over multiprotocol label switching (MPLS) and IP already exists for like-tolike ACs, such as Ethernet-to-Ethernet or Point-to-Point Protocol (PPP)-to-PPP. L2VPN
Interworking builds on this functionality by allowing disparate ACs to be connected. An
interworking function facilitates the translation between different L2 encapsulations.