Question 13 (2 points) Listen What is the best control to mitigate the threat of paying prices that are too high for goods ordered? Require the receiving department to verify the existence of a valid purchase order. Use only approved suppliers and solicit competitive bids. Only pay invoices that are supported by the original voucher package. Use bar-code technology to eliminate data entry errors. Question 14 (2 points) 1) Listen Identify the most effective method to ensure the availability of information systems? High bandwidth. Maintain a hot site. Maintain a cold site. Frequent backups