14. An embezzlement scandal forced Padgett-Beale to adopt computer-based point of sale systems throughout the company for all cash handling functions. Which of the following data security principles and practices must be applied to ensure that these systems cannot be exploited by future embezzlers? a. Implementing firewalls to protect the servers hosting the transaction databases (data at rest). b. Protecting data in use by shredding the paper transaction tapes and receipts created by the computerized cash registers. c. Installing video cameras to protect the daily backup tapes prior to shipment to offsite data storage. d. Uninstalling web browsers and email clients from the computers used to host the Point of Sale systems