13. Consider the following systems flowchart as you respond to the question: Inventory manager General manager Accounting manager Vendor Start Purchase order Prepare purchase Prepare Generate order Approve and send invoice & purchase check ship goods order Approved B purchase order Receive goods End Which of the following statements about documents in the flowchart is m A. "Purchase order" and "approved purchase order" should not be shown they refer to the same document. B. The flowchart should include at least two more document symbols. C. Both "Purchase order" and "approved purchase order" should not be s since they refer to the same document and the flowchart should include more document symbols are true. D. Neither "Purchase order" and "approved purchase order" should not be separately since they refer to the same document nor the flowchart sh east two more document symbols is true