Which are key features of multi-tier processes for suppliers? Note: There are 2 correct answers to this question.

Which are key features of multi-tier processes for suppliers? Note: There are 2 correct answers to this question.
A . A copy supplier will have visibility to a raw material PO in a multi-tier order.
B . Two supplier and a logistics provider can be a part of a multi- tier order.
C . Suppliers can provide manufacturing data to their buyers.
D . A supplier can send a PO on behalf of the buyer

Answer: A,B