单项选择题 A computer is failing to boot. Which of the following tools would be used FIRST in troubleshooting? （）

单项选择题 A user works daily with video production and needs portable storage which will allow them to transport their work back and forth from home. Taking the users storage and bandwidth requirements into consideration, which of the following would BEST suit the users needs?（）

单项选择题 A Windows XP system locks up after the GUI starts to load. The system will start in Safe Mode. TheEvent Viewer reports that a driver failed to load. Which of the following methods would help diagnose the problem? （）