Which of the following statements is true regarding encryption and content filtering appliances? This type of question contains radio buttons and checkboxes for selection of options. Use Tab for navigation and Enter or space to select the option. option A The encryption and content filtering appliances modulate an analog carrier signal to encrypt digital information and demodulate the signal to decrypt the transmitted information. option B The disadvantage of using encryption and content filtering appliances is that they provide more choice of encryption methods but weaker encryption options. option C While an encryption appliance is dedicated to encryption, a content filtering appliance scans the content of what goes through it and filters out specific content or content types. option D These appliances speed up the network's service requests by recovering information from a client's earlier request.