which subconfiguration mode should SOO be configured?

A Cisco IOS XR router is acting as a PE and is running EIGRP as the CE-PE routing protocol.
SOO must be configured. Under which subconfiguration mode should SOO be configured?

A.
RP/0/0/CPU0:XR1(config-eigrp)

B.
RP/0/0/CPU0:XR1(config-eigrp-vrf-af-if)

C.
RP/0/0/CPU0:XR1(config-eigrp-vrf)

D.
RP/0/0/CPU0:XR1(config-eigrp-vrf-af)