What IOS feature can be used to modify or redirect L2-attachment circuits over AToM with OSPF to a different path selection?

What IOS feature can be used to modify or redirect L2-attachment circuits over AToM with OSPF to a different path selection?

A.
A GRE Tunnel with MPLS Enabled

B.
a PW-class Tunnel Selection

C.
Policy Base Routing

D.
Modify cost