Which of the following SAP ERP documents can support this requirement?

Your customers wants to use the cost distribution function to include transportation costs in the material valuation.

Which of the following SAP ERP documents can support this requirement? Note: There are 3 correct answers to this question.
A . Stock transport order
B . Inbound delivery
C . Outbound delivery
D . Purchase order
E . Sales order

Answer: A,B,D