How do you connect SAP Extended Warehouse Management to communicate with the programmable logic controllers [PLC]?

Your customer wants to implement the material flow system [MFS] to control conveyers and the automated high rack storage area .

How do you connect SAP Extended Warehouse Management to communicate with the programmable logic controllers [PLC]?
A . Directly integrate to the PLC using ABAP Push channels
B . Use an RFC adapter to connect with the TCP/IP socket server of the PLC
C . Activate the link to the subsystems using the ALE interface on the warehouse number
D . Send an IDoc through a Post Processing Framework action to the PLC

Answer: B,C