Which Two Statements Describe Primary Differences Between MPLS Layer 2

Which two statements describe primary differences between MPLS Layer 2 and Layer 3 VPNs? (Choose two.)

A) Layer 2 VPNs use IPsec tunneling, but Layer 3 VPNs use L2TPv3 tunneling.
B) Layer 2 VPNs use AToM, but Layer 3 VPNs use MPLS/BGP.
C) Layer 2 VPNs use BGP, but Layer 3 VPNs use VPLS.
D) Layer 2 VPNs use L2TPv3 tunneling, but Layer 3 VPNs use GRE tunneling.
E) Layer 2 VPNs use IPsec tunneling, but Layer 3 VPNs use pseudowires to provide tunneling.