Which of the following are required to enable account changes when posting an invoice with reference to a purchase order item with account assignment? Note: There are 2 correct answers to this question.
A.  Choose multiple account assignment combined with a partial 
invoice indicator in the purchase order item. 
B.  Choose either a non-valuated goods receipt or no goods receipt 
posting in the purchase order item. 
C.  Allow account assignment changes during invoice receipt in 
customizing for the account assignment category.
D.  Choose a valuated goods receipt in the purchase order item 
and post the invoice before the goods receipt.