Why would you use a preliminary billing document in SAP S/4HANA? Note: There are 2 correct answers to this question

Why would you use a preliminary billing document in SAP S/4HANA? Note: There are 2 correct answers to this question
A . You want to update financial accounting before final billing takes place.
B . You want to facilitate negotiations with the customer
C . You want to create a partial invoice.
D . You want to create output without updating financial accounting.

Answer: B D