What does the document type control when an invoice is entered? (Choose two.)

Occasionally a vendor delivers goods without a purchase order. You want the system to create a purchase order for such deliveries automatically when a goods receipt is posted.
What are the prerequisites for this scenario? (Choose two)

To which object can you directly assign an account assignment category in SAP Materials Management?
Please choose the correct answer.
Response:

What does the item category specify in a purchasing document in SAP Materials
Management?
Please choose the correct answer.
Response:

Where do you select the default setting for the order acknowledgement indicator in SAP Materials Management?
There are 3 correct answers to this question.
Response: