When setting up order transaction types, which is the first setup step required?

[answerhappygod]

When setting up order transaction types, which is the first setup step required?

A. Create the Order Transaction type.
B. Create a document sequence for orders.
C. Create the Line Transaction type for order lines.
D. Create the Line Transaction type for return lines. E. Assign line flows to the Order Transaction Type. F. Assign the Order transaction type to the document sequence.