Danielle, a help desk technician, receives a call from a client. In a panic, he explains that he was using the Internet to research a new product when his computer emitted an alarm accompanied by a warning that a site had blocked his computer and that information was being stolen from the computer. The message included a phone number and a note to call the number within five minutes so that engineers could walk him through the removal process. What has happened to the customer computer?A. The client received a fake security alert. B. This is a real alert, and the client should call the number. C. Data is being stolen, and the client should disconnect from the network. D. The web browser has been hijacked by a virus.