A user reports that their computer suddenly will not boot. When the technician arrives, they discover that the user is very worried they will not be able to complete a research paper theyve been working on which is due by the end of the day. Which of the following is an appropriate response to the users concerns? （）

• A、A Trojan may have infected the OS or worked its way into the MBR. What did you download recently that caused the problem?
• B、I understand your concern, and will try to have your computer working again as quickly as possible so that you can finish your report.
• C、If the paper was so important to you, you should have created a backup copy so you could finish it on another computer.
• D、I do not understand why you are upset. I am sure your professor will understand and you will be able to turn in the paper tomorrow.