who tells the billing department where to send the invoice?\nprocessing orders at highland shoes\na) the…

who tells the billing department where to send the invoice?\nprocessing orders at highland shoes\na) the order center\nb) the warehouse\nc) the customer\nd) this information is not provided
Answer
Brief Explanations:
By observing the flow - chart, there is no arrow indicating which entity tells the Billing Department where to send the invoice.
Answer:
D) this information is not provided