Which command sequence leads to the successful creation of a Layer 3 port channel on an OS10 switch?

Which command sequence leads to the successful creation of a Layer 3 port channel on an OS10 switch?
A . 1(config-if-po-2)# ip address 192.168.0.0/31
S1(config-if-po-2)# no switchport
B . S1(config-if-po-2)# ip address 192.168.0.0/31
S1(config-if-po-2)# no switchport
C . S1(config-if-po-2)# ip address 192.168.0.0/31
S1(config-if-po-2)# switchport mode IPv4
D . S1(config-if-po-2)# no switchport
S1(config-if-po-2)# ip address 192.168.0.0/31

Answer: D