How can you fulfill these requirements in SAP ECC?

You want to produce a finished product only when it is requested by a customer order in make-to-order production. However, all assemblies need to be procured beforehand.

How can you fulfill these requirements in SAP ECC? (Choose two)
A . Use strategy 50 (planning without final assembly) for the finished product and no strategy for all assemblies in the bill of material.
B . Use strategy 30 (production by lots) for the finished product and strategy 70 (planning at the assembly level) for all assemblies in the bill of material.
C . Use strategy 20 (make-to-order production) for the finished product and strategy 70 (planning at the assembly level) for all assemblies in the bill of material.
D . Use strategy 40 (planning with final assembly) for the finished product and strategy 70 (planning at the assembly level) for all assemblies in the bill of material.

Answer: A,C